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carotman
04-01-2007, 06:16 PM
That's right. I found THE solution to the B20A "RARE" transmission.

We all know that the B20A can be somewhat easy to find but finding the 5 speed transmission can be a real challenge.

I've noticed that the B18A (The B20A little cousin) has a transmission configuration really similar to the A20A. I've been wondering for some time if the B18A transmission is similar to the A20A. Well, it turns out it shares the same transmission case and cover.

I checked my JDM parts catalog today and compared part numbers with the B18A.

Here are some relevant part B18A numbers:

Transmission case: 21200-PC8-J52
Transmission end cover: 21310-PC8-961
Transmission end cover gasket: 21395-689-000
Oil Seal: 91206-PC8-003
T/O Bearing: 22810-PC8-921
Mainshaft: 23211-PC8-J30
Countershaft: 23220-PC8-671
Fork, Low Gearshift: 24221-PC8-920
Differential Case: 41310-PC8-621

ALL, and I mean ALL these parts can be cross referenced at your local Honda dealer in North America. These parts are all from the JDM B18A transmission that WILL bolt up to the JDM B20A engine.

You can look for yourself by entering the part numbers here: www.slhondaparts.com (http://www.slhondaparts.com/)

So far, I realized that all you need to install an A20A transmission on a B20A is the B18A bell housing. That thing can easily be had from New-Zealand or any other country that had JDM imports.

Of course, the A20A transmission has longer gears but you can always use the 1st gen Integra internals and you'll get a transmission that's really similar to the B2K5 or F2K5 from the JDM B20A.

There "might" be some differences that would not work but so far, every part matches, even the bearings and seals. All you would need to do is get that B18A bell housing, install it on your A20A transmission, use the A20A clutch and you're on!

ghettogeddy
04-01-2007, 06:19 PM
nice make sure bullurd sees this so he dosent sell his motor

A18A
04-01-2007, 06:19 PM
fugging awesome one carotman :D :D :D :thumbup:

BITESIZE
04-01-2007, 06:21 PM
That's indeed an uber good find! Kudos!

frantik
04-01-2007, 06:21 PM
I think I deserve a beer now, don't I?
:cheers:

good job figuring this out c-man :thumbup:


[edit: and why not smilies here :(]

carotman
04-01-2007, 06:32 PM
I noticed that even the B18A AND B20A auto tranny has the same case as the A20A auto tranny... This means only the bellhousing is different between the A20A and B18A/B20A auto trannies.

So, if you have a low miles B20A auto tranny, don't throw it in the garbage, they are of some use for the guys here that blew their A20A trannies.

I'm glad I kept my B20A tranny :p

MessyHonda
04-01-2007, 06:32 PM
time to give steve_si a call....

Steve_Si
04-01-2007, 06:44 PM
So can you confirm that all I need to send Bullard123 is the bellhousing? If so I can take the rest to the metal recycling centre.

Also, will the bellhousing from an auto B18A transmission be useful to those with a manual transmission from an A20A?

carotman
04-01-2007, 06:49 PM
Hmm. I'll have to compare every single part to comfirm that it's 100% the same. Give me an hour and I'll be able to do it I guess. 3geez is worth more than an hour of my time hehe.

And yes, the B18A/B20A auto bellhousing is all you would need to install an A20A auto tranny to a B20A.

Edit: Well, I just thought about something

IF the mainshaft, countershaft, differential, shift forks and bearings are the same, the A20A tranny will work with a B18A bellhousing.

I compared the gears and they come up on www.slhondaparts.com...

Great news.

BITESIZE
04-01-2007, 06:56 PM
^^^You are 3geezus!

carotman
04-01-2007, 07:04 PM
Steve (or anyone from NZ)

If you come by any DEAD B18A tranny, this is worth GOLD for us guys in North America. You can probably sell the bellhousing alone for 3 times the price of the dead tranny :p

Legend_master
04-01-2007, 07:15 PM
Im sorry, but is this an april fools joke?

bullard123
04-01-2007, 07:16 PM
Hmmm I hope you are right Carotman. Cause I didn't want to run into anymore surprises lol. I knew I was on to something when my stage1 clutch from my A20 bolted up directly to the B20A. Thanks for completing the rest of that research too. It seems something good always comes out of a bad situation. Now we can see more B20a geeez riding around. And Steve I'll be looking forward to your Pm with the costs.

Ichiban
04-01-2007, 07:18 PM
I wonder if advance adapters or downey would cast us more B18A bellhousings if we sent them one and asked for copies?

bullard123
04-01-2007, 07:25 PM
Oh and this thread should be a sticky Carotman :)

carotman
04-01-2007, 07:37 PM
Oh, one more thing, you'll probably still need the B18A rear bracket to go with the bellhousing. The bracket doesn't cross reference with the A20A

You'll need the flywheel cover too.

bullard123
04-01-2007, 08:16 PM
Alright Thanks. I hope Steve Si see's this too

forrest89sei
04-01-2007, 09:42 PM
Great Job!

ZackieDarko
04-01-2007, 09:47 PM
good god i hope this isnt an april fools joke

bullard123
04-02-2007, 04:54 AM
Oh, one more thing, you'll probably still need the B18A rear bracket to go with the bellhousing. The bracket doesn't cross reference with the A20A
You'll need the flywheel cover too.
Hey Carotman shouldn't the rear bracket and flycover from a B20a tranny work?? Steve might have a hardtime trying to find another B18 5 speed donor car because I'm sure the flywheel cover isn't on the tranny right?

ghettogeddy
04-02-2007, 06:21 AM
who really needs a flywheel cover i havent had one on mine for like a year at least lol it hasent made a dif at all

A18A
04-02-2007, 06:27 AM
cant ya just make one with some cheap metal anyway?

L3G10N
04-02-2007, 06:39 AM
So Carot, are we going back together next week buying all the B20A lying down in the JDM shop? lol They almost all have automatic tranny :)

guaynabo89
04-02-2007, 08:01 AM
Good find Carot!

Glad to see ur still out there diggin up info for the rest of us. Makes we want to pick up a b20 and swap all my stuff over :D

carotman
04-02-2007, 09:52 AM
I guess the B20A rear bracket will work. I'll check that later tonight.

Legion, we'll buy the "useless" B20A auto trannies for like 50 bucks at the importers :D

snoopyloopy
04-02-2007, 01:10 PM
well then. if this is the case, i should be getting my b20a much sooner than planned. should be easier to ship this way. and also, does this mean we can use the same axles as the a20? (did i miss that part? lol...)

so basically, all we need to get a b20a running is a b20a engine itself and the rear mount/brackets. bc we can use b20a5 ecu and hacked wiring harness (or go obd-1) and a20a flywheel/tranny and it bolts to the driver's side mount. if that's the case, then hell, we can all be running a b20a in september. :lol: :deal:

thegreatdane
04-02-2007, 01:24 PM
Makes you wonder why they bothered to make a completely different 5speed for the B20A...

For those who wants to do this, just remember that the B16 LSD only fit's the B20A 5speed.

88LXi68
04-02-2007, 01:24 PM
so basically, all we need to get a b20a running is a b20a engine itself and the rear mount/brackets. bc we can use b20a5 ecu and hacked wiring harness (or go obd-1) and a20a flywheel/tranny and it bolts to the driver's side mount. if that's the case, then hell, we can all be running a b20a in september. :lol: :deal:

No...if I understood it correctly you NEED a B20 or B18 bell housing (auto or 5spd) Then you can you bolt up the actual gear housing to the B20/B18 bell housing. Since there seems to be a plethora of auto B20s it allows you to make it 5spd. Someone correct me if I am wrong.

snoopyloopy
04-02-2007, 01:29 PM
No...if I understood it correctly you NEED a B20 or B18 bell housing (auto or 5spd) Then you can you bolt up the actual gear housing to the B20/B18 bell housing. Since there seems to be a plethora of auto B20s it allows you to make it 5spd. Someone correct me if I am wrong.
yeah, that's what i meant. it's only absolutely necessary to source the bellhousing. everything else can be hacked to fit from usdm parts.

Legend_master
04-02-2007, 01:45 PM
No...if I understood it correctly you NEED a B20 or B18 bell housing (auto or 5spd) Then you can you bolt up the actual gear housing to the B20/B18 bell housing. Since there seems to be a plethora of auto B20s it allows you to make it 5spd. Someone correct me if I am wrong.


From reading you need an auto bell housing to hook up an a20 auto tranny, and a 5 speed bell housing to use the a20 5speed.

A18A
04-02-2007, 02:28 PM
i thought it had to be a b18a bell housing :confused:

Legend_master
04-02-2007, 03:03 PM
i thought it had to be a b18a bell housing :confused:


From what I understand, that is correct. b18 auto bell housing with a20 auto tranny or b18 5-speed bell housing with a20 5-speed tranny. That is what I am getting from Carotmans statements.

snoopyloopy
04-02-2007, 03:28 PM
From what I understand, that is correct. b18 auto bell housing with a20 auto tranny or b18 5-speed bell housing with a20 5-speed tranny. That is what I am getting from Carotmans statements.
yes, i think that's what he's saying. oh great carot, shine some light upon us poor b20a-less usdm mortals. maybe add this to the b20a how-to.

RobT5580
04-02-2007, 03:54 PM
Thanks a lot carot you just dropped the value of my spare B20A 5-Speed......No just joking that is a great find indeed and i appreciate it. I was gonna tear down my spare tranny and try to get a match on my damaged gear but no need now.

Thanks for the information you have contributed a lot to this and its appreciated!

carotman
04-02-2007, 04:57 PM
From what I understand, that is correct. b18 auto bell housing with a20 auto tranny or b18 5-speed bell housing with a20 5-speed tranny. That is what I am getting from Carotmans statements.

That's right, Auto B18A + Auto A20A or manual B18A + Manual A20A

You can't mix Auto and Manual bellhousings.


snoopyloopy, you can also use your A20A axles with the B20A tranny. It's just better to use the intermediate shaft since most of them come with the engine anyway. You can also turn the auto midshaft into a 5speed one by using USDM B20A5 parts so it's no problem here.

I compared the rear bracket part numbers and here's what I came up with:
Auto B18A: 50827-SE0-930
Manual B18A: 50827-SE0-910

Auto B20A: 50827-SE0-930
Manual B20A: 50827-SE0-930

None of these brackets are available in North America

And here's the rear mount itself:
Auto B18A: 50811-SA5-983
Manual B18A: 50811-SA5-020

Auto B20A: 50811-SE0-980
Manual B20A: 50811-SE0-000

All these rear mounts are available in North America at the Honda dealer


So... this means that the Manual B18A has it's own bracket. Would it still work with the other bracket? I'm pretty sure it would but can't guarantee it. I have no B18A bracket here to compare.

Honda has 4 rear different rear mounts for these engines but only 2 brackets... I guess it's just a matter of how hard they are able to damper the vibrations. I compared an Auto and Manual A20A rear mount myself and other that the AT or MT markings, they were the same.

If you're REALLY worried about fitment issues, you can get that rear bracket through www.honda.co.nz (I bought new parts there myself) or just ask these guys. www.stronghonda.co.nz

Anything that needs to be cleared up?

P.S. In the JDM parts catalog, a brand new B18A bellhousing is listed at 22600 Yen, which is approximately USD $190. Prices might have changed since then but I guess that assuming the B18A bellhousing costs 200 bucks isn't far from the truth. Not too bad but not that cheap. It all depends on how much it costs to ship. The B18A rear bracket is listed at 2750 Yen which is 23 bucks... I would just get one from a Honda dealer in New Zealand and forget about fitment issues.

snoopyloopy
04-02-2007, 05:15 PM
so if we get a b20a, all we'd need is the a20a mt5 transmission, b18a mt5 bellhousing, b18a mt5 rear mount and b18a mt5 rear bracket?

A18A
04-02-2007, 05:19 PM
That's right, Auto B18A + Auto A20A or manual B18A + Manual A20A

You can't mix Auto and Manual bellhousings.

so all the problem really solves is if you have a b18 manual gearbox you can just go and blow it up and you can just bolt on a manual a20 gearbox to the bell housing?

so your still gonna have to find b18 manual gearboxes/bell housings?

snoopyloopy
04-02-2007, 05:52 PM
so all the problem really solves is if you have a b18 manual gearbox you can just go and blow it up and you can just bolt on a manual a20 gearbox to the bell housing?

so your still gonna have to find b18 manual gearboxes/bell housings?
yes, but it's much cheaper to ship a bellhousing as opposed to a tranny. and also, bellhousing probably wouldn't blow nearly as easily as the whole tranny will for the vast majority of us. but even so, it probably wouldn't be too hard to get something fabbed up if the need arose. much better than getting a whole custom tranny, that's for sure.

carotman
04-03-2007, 04:26 AM
so if we get a b20a, all we'd need is the a20a mt5 transmission, b18a mt5 bellhousing, b18a mt5 rear mount and b18a mt5 rear bracket?

You don't "really" need the rear mount. The one you have on your car will do and it's available anywhere. All you need is the bellhousing and the rear bracket (tough the B20A one might work too). You can probably want the flywheel cover (under the tranny) but that's all. Oh, mayne the lower rubber damper is also different. I'll check into this too.

Like you said, the bellhousing is unlikely to break unless something really nasty happens to the transmission. Most of the time they can be rebuilt too if it ever blows a hole near the differential gear.

It doesn't "solve" the problem but it gives us an alternative to the rarer B20A 5speed tranny. The B18A doesn't seem to be that common either but shipping a bellhousing can be done through regular mail when a regular complete tranny can't.

You guys want me to post pictures of that B18A transmission just like in this thread with the part numbers and everything?

http://www.3geez.com/forum/showthread.php?t=43448

Ichiban
04-03-2007, 08:14 PM
So what is the part number for the B18a bellhousing? I want to keep my eyes open for one, and just for kicks, approach the local Honda dealer about it.

Steve_Si
04-03-2007, 08:46 PM
Does the parts catalogue give the weight of the B18A bellhousing? The cost of sending an entire transmission is astronomical. I could just about fly over with the bellhousing in my carry-on luggage for the price of shipping the transmission by sea lol.

carotman
04-04-2007, 05:03 AM
Unfortunately, thye don't list the weight of the bellhousing. It shouldn't be that heavy since it's all aluminium.

3GCVC
04-04-2007, 09:06 PM
Yeah i can confirm that this works as when wohdog blew his diff he was running an A18 box we used the diff from an A20A box and it worked perfectly.

sadly the B18 in manual is just about as hard to find as a manual for a B20A in the first place as it only came in the EXL-S as far as i know.

B20A 2G Ludes are the easiest way to find manual boxes for B20 as they came out manual more often.

A18A
04-04-2007, 09:12 PM
sadly the A18 in manual is just about as hard to find as a manual for a B20A in the first place as it only came in the EXL-S as far as i know.
i hope you mean the b18 :o

3GCVC
04-04-2007, 11:13 PM
i hope you mean the b18 :o

yes i do sorry... fixed..

bullard123
04-05-2007, 05:09 AM
Yeah i can confirm that this works as when wohdog blew his diff he was running an A18 box we used the diff from an A20A box and it worked perfectly.

sadly the B18 in manual is just about as hard to find as a manual for a B20A in the first place as it only came in the EXL-S as far as i know.

B20A 2G Ludes are the easiest way to find manual boxes for B20 as they came out manual more often.
Thats great that you guys figured this out but you guys should have posted it earlier. Maybe you might have and I just didn't read it but I've been trying to gat a tranmission for my B20 nearly a year now and this informaion would have gotten my car on the road a lil faster. Its all good now that I know about it. But this will save a lot of members all of the pain and heartache that I had to go through.

carotman
04-05-2007, 05:44 AM
sadly the B18 in manual is just about as hard to find as a manual for a B20A in the first place as it only came in the EXL-S as far as i know

Indeed, only in the EXL-S Accord/Vigor

However, you can find them at the Honda dealer in New-Zealand for a "reasonable" price. Much easier that shipping a whole new B20A tranny.

Steve_Si
04-05-2007, 01:32 PM
Today I'm going to have a go at removing the bellhousing, is it just a matter of removing bolts or is there something else I should know?

3GCVC you should try and find these guys some bellhousings. They come from EXL-S, EX-S Accords, GXL-S and GX-S CA Accords, MXL-S, MX-S Vigors and LXR-S Aerodecks.

Steve_Si
04-05-2007, 02:29 PM
Today I'm going to have a go at removing the bellhousing, is it just a matter of removing bolts or is there something else I should know?


Got all the bolts out from around the edge, and removed this thing that seems to move shit in and out of the gearbox. Help :(

http://img92.imageshack.us/img92/3117/transmissionkf9.jpg

bullard123
04-05-2007, 05:09 PM
Sweet! I'll have to steam clean it once gets here. Where r you at Carotman!

Steve_Si
04-06-2007, 10:37 PM
Does anyone know how to get the bellhousing off? All bolts around the edge have been removed, and I can get a 2 to 3mm gap around the join, but can't get it apart :(

88LXi68
04-07-2007, 04:49 AM
Does anyone know how to get the bellhousing off? All bolts around the edge have been removed, and I can get a 2 to 3mm gap around the join, but can't get it apart :(

http://www.pauldesign.ru/honda/shopmanual/62se300.pdf

kraftaroni
04-07-2007, 11:55 AM
Get out the 30mm and turn it the wrong way! haha then you can get the bell housing off. the whole gear assy will come apart then. I've had lots of fun doing this a few times I've blown up a couple diff's not fun!

Steve_Si
04-07-2007, 01:45 PM
http://www.pauldesign.ru/honda/shopmanual/62se300.pdf

Hmmm I don't have the tools for that, i'll have to ask my friends to help next time they come over.

SQ is the SQUAD
04-09-2007, 05:15 AM
i am lost as hell here. rember back a few months ahot i started a b18a ti a20a adapter plate project. well i still have the stuff (not finished). i dissassembled my b18a tranny and the bell housing dosent match out to the a20a block no where close. i know the b18a gear box and the a20a gear box are totally different because the a20a has the big inspection plate that comes off. can someone revise this listing not using engine codes but actuall tranny codes and chasis codes. if i recall, there is a b18a that is different than out us b18a, i hope we are not getting confused

kraftaroni
04-09-2007, 05:41 AM
You know I have to say people seem to chime in more on this forum than any other without reading the thread! B20a jdm and the b18a are a bellhousing match on the engine to transmission mating surface. Furthermore you can attach the a20 gearbox to the b18a bellhousing.

SQ is the SQUAD
04-09-2007, 03:19 PM
now i get it. i was thinking of mating a b18 tranny to an a20 block. this is to mate a b18 tranny to a b20 block

Steve_Si
04-09-2007, 03:54 PM
now i get it. i was thinking of mating a b18 tranny to an a20 block. this is to mate a b18 tranny to a b20 block

Other way around. A20 tranny to a B20A block using B18A (old 3G JDM version) bellhousing.

snoopyloopy
04-09-2007, 04:22 PM
i am lost as hell here. rember back a few months ahot i started a b18a ti a20a adapter plate project. well i still have the stuff (not finished). i dissassembled my b18a tranny and the bell housing dosent match out to the a20a block no where close. i know the b18a gear box and the a20a gear box are totally different because the a20a has the big inspection plate that comes off. can someone revise this listing not using engine codes but actuall tranny codes and chasis codes. if i recall, there is a b18a that is different than out us b18a, i hope we are not getting confused
the b18a they're talking about here is the 130hp carbed b18a from the jdm accord, not the ls b18a from the integra. from that was said, if you get a b20a engine, you can then use the accord b18a bellhousing and bolt that to an a20a tranny and that combo will work.

A18A
04-09-2007, 05:27 PM
its kinda like a b20 > a20 tranny adapter :)

Cmac
04-09-2007, 08:34 PM
OK so just to clarify In one post so its a lil cleaner for the newb's ie me
what needs to be changed.......

You mention the carbed engine, how does this effect the F.I. if any?


_CMAC

carotman
04-10-2007, 04:12 AM
the b18a they're talking about here is the 130hp carbed b18a from the jdm accord, not the ls b18a from the integra. from that was said, if you get a b20a engine, you can then use the accord b18a bellhousing and bolt that to an a20a tranny and that combo will work.
Exactly, there is NO Integra that came with a B18A anyway. There was a B18A1 but no B18A ever.

In Japan, they had a ZC or the B16A. The JDM B18A is from the Accord/Vigor only

SQ is the SQUAD
04-10-2007, 11:20 AM
Exactly, there is NO Integra that came with a B18A anyway. There was a B18A1 but no B18A ever.
In Japan, they had a ZC or the B16A. The JDM B18A is from the Accord/Vigor only

the prob with that is any honda site you go to and refet to a b18a they are going to think anbout the b18a1 that came in the 90-93 integra like i did. alot of times we might say a20a in general but mean a20a1 or a20a3 and so on. that why i said its better not to use engine codes but exact model of cars

3GCVC
04-12-2007, 01:59 AM
EXL-S Manual in CHCH member should grab this if it goes cheap

http://www.trademe.co.nz/Trade-Me-Motors/Cars/Honda/auction-95082157.htm

A18A
04-12-2007, 02:24 AM
yeah but if u see the Q's & A's it says it has a a18 =( notice that most of the good cars are down chch :thumbdn:

3GCVC
04-12-2007, 02:25 AM
yeah but anyone could muck up a18 instead of b18 most people dont have a clue we need an engine bay pic

A18A
04-12-2007, 02:26 AM
true :o

ZackieDarko
04-12-2007, 02:30 AM
that does it...im moving to new zeland 1st chance i get

you get all the good car stuff

Steve_Si
04-12-2007, 03:09 AM
I think I'm the only active Christchurch member :(

I have too many 3gs as it is, gotta get rid of two soon. Gotta drag my friends over so they can swap the transmission and also remove the bellhousing from Bullard's transmission so I can finally send it.

Steve_Si
04-13-2007, 10:03 PM
Bullard, I would have sent this as a PM but your inbox is full:

Well I made the mistake of trying to do it myself. Got a 30mm socket and got it all out, but was too rough with it and now it's probably useless. It just didn't occur to me that alloy would break so easily.

http://img407.imageshack.us/img407/4592/p1010036ko1.jpg

I know how long you've been waiting for the right transmission, I'm really sorry to have fucked this one up. I'll go to the junk yard on Monday and see if they have one already seperated.

The good news is they are very light without the gears in.

bullard123
04-14-2007, 07:16 AM
Bullard, I would have sent this as a PM but your inbox is full:
Well I made the mistake of trying to do it myself. Got a 30mm socket and got it all out, but was too rough with it and now it's probably useless. It just didn't occur to me that alloy would break so easily.
http://img407.imageshack.us/img407/4592/p1010036ko1.jpg
I know how long you've been waiting for the right transmission, I'm really sorry to have fucked this one up. I'll go to the junk yard on Monday and see if they have one already seperated.
The good news is they are very light without the gears in.
No problem dude. This is all new to you since you never have to tear them apart lol. I know it would have been a lot easier just shipping the tranny as a whole. I cleaned my inbox out out too. Didn't realize I had so many Pm's lol. I hope they can break down a b20a tranny down for you at the junkyard. I now its a real pain trying to gut these trannys.

ICEMAN707
04-14-2007, 07:22 AM
Has anyone ever thought of custom made bellhousings? Wouldn't it be nice to have a new b-series transmission custom fit with a custom bellhousing instead of just an adapter plate?

Pretty much like making a custom oil pan out of some aluminum sheet metal, same concept for making a custom bellhousing to use any gearbox you want for your car. Just gotta take transmission shaft reach and axle alignment into consideration.

Would be awesome to have a custom fully CNC machined bellhousing, but a little custom aluminum sheetmetal cutting/welding is nice too. A custom diamondplate bellhousing for instance.

Another option would be to cut b-series tranny bellhousings in 3/4 and weld it to the 1/4 part (the part that bolts to the block) of the stock bellhousing of your stock transmission. Although aluminum takes some skill to weld.

carotman
04-14-2007, 07:38 AM
This can probably be rewelded back if you still have the other broken parts.

That tranny was dirty inside!!!

Steve_Si
04-14-2007, 01:39 PM
Yep I still have the bits that broke off, but it might not be that hard for me to find another bellhousing. The junk yard I visited last time had lots of "rare" stuff. The folding fogs, a 2.0Si Exclusive and plenty of other 3Gs.

I'll still put the broken one in a box and stop by the post office on the way to work to find out how much it would be to send.

And it wasn't dirty inside, i'm not sure why the oil looks like it has lots of shiney bits in it, doesn't look like that irl.

So far this year I've ruined a F1 2.0Si and a B18A transmission :P

RobT5580
04-15-2007, 03:06 PM
If its hard to get the B18 housing and this is something someone wants to put effort into they could have a machine shop duplicate a bell housing. It would be cheaper than designing an original one off part for sure. Thats something i would consider if i was in a situation and carotman did his homework opening up many doors.

ICEMAN707
04-16-2007, 02:21 PM
also forgot to mention the custom made bellhousings have to be in OEM tolerances or better. making sure the sheetmetal is thick enough and the welds are perfectly strong. the transmission is subject to high amounts of torsional/rotating force. the bellhousing has to be able to support the gearbox and at the same time also fit well in the engine bay.

RobT5580
04-16-2007, 04:04 PM
Plus i would think making a new bell housing will be pricey. I have a friend that could probably make it but its the initial CNC program/time to get the first one made. I have not looked into the B18 housing but if you get that you should be good to go. Sorry if i missed some info since i skimmed through here.

thegreatdane
04-17-2007, 08:46 AM
Making a CNC program for a bellhousing copy would be pretty damn comprehensive.

Ichiban
04-17-2007, 05:32 PM
I wonder if advance adapters or downey would cast us more B18A bellhousings if we sent them one and asked for copies?

AccordB20A
04-18-2007, 04:50 PM
well i jst read this thread and yes if i had of told you when i blew my gearbox you could have found alll this out earlyer.... heres my side of the story...

using the b18a gearbox in my car involved using the b18a axles( right side short left side long).. not the a20a axles. using the a20a axles made the long shaft allways pop out of the inner cv. it seems to be shorter for some silly reason. and using the b18 gearbox you CANNOT use a half shaft

the a20a/a18a clutch kits and flywheels are the same and you can use a d16/zc clutch plate and pressure plate on the a20a flywheel. also i found out some a20a flywheels dont bolt to the b20a cause of block clearance issues.. but if you lighten the flywheel by removing material from the rear it will fit.

yes i did use a diff from a a20a2 gearbox whyen i blew the diff in my b18a gearbox on my b20a. when the diff blew it made holes in the bellhousing i patched the holes and put the gearbox back together and it works fine so its my spare. and i think the d16/zc that your integras have and our civic sis have is also compatible with the b18a/a18a gearboxes

if someone wants a bellhosing to copy and make copys of ill send mine as long as they send me a copy back lol. they are rare as shit around here too

if you are planning on using a digital dash in your 3g with a b18a/a20 box hybrid or just a plain b18a box forget havging an accurate speedo.

3GCVC
04-20-2007, 01:28 PM
posted from another thread thought i would add it to the list

I contacted my contact about this and this is what he says

Quote:
There is afew types of box on all those engine's the B18A can have A2N5 and E2N5 and B2K5 and the B20A can also have the B2K5 and F2K5 we would sell the gearbox's complete but if you could tell me how many people were interested I could check on the price of brand new bellhousings from japan as they might be a clearance item

So which box is it from the B18 that you guys need the bellhousing from the above box codes?
and how many people would be interested if the price was right?

this is if you guys dont copy the bellhousing but i think thats going to be a lot of money and time.

ICEMAN707
04-20-2007, 06:27 PM
if i had the time, money, and the machinery to do it, i would copy the dimensions of the jdm b20a and b18a bellhousing and make a totally custom bellhousing prototype and sell copies.

MessyHonda
04-20-2007, 06:29 PM
if i had the time, money, and the machinery to do it, i would copy the dimensions of the jdm b20a and b18a bellhousing and make a totally custom bellhousing prototype and sell copies.
this is when Lostforawhile walks in.....:thumbup:

AccordB20A
04-20-2007, 08:20 PM
posted from another thread thought i would add it to the list
I contacted my contact about this and this is what he says
Quote:
There is afew types of box on all those engine's the B18A can have A2N5 and E2N5 and B2K5 and the B20A can also have the B2K5 and F2K5 we would sell the gearbox's complete but if you could tell me how many people were interested I could check on the price of brand new bellhousings from japan as they might be a clearance item
So which box is it from the B18 that you guys need the bellhousing from the above box codes?
and how many people would be interested if the price was right?
this is if you guys dont copy the bellhousing but i think thats going to be a lot of money and time.

my b18a gearbox was a b2k... im sure it was b2k not b2k5.. but im unsure as the label fucked off ages ago and the 5 may have been missing. either way the only way to tell it apart from the other b2k5's is if it has an end cap or not. if it has a black end cap its a b18a gearbox, the one we want if it doesnt its a b20a b2k5

thegreatdane
04-21-2007, 02:13 AM
if i had the time, money, and the machinery to do it, i would copy the dimensions of the jdm b20a and b18a bellhousing and make a totally custom bellhousing prototype and sell copies.

I think you would have better luck selling adapter kits for B series trannys, and they would be cheaper/easier to make.

accord2fast
04-21-2007, 02:16 AM
Hey carot man.. thanks for the info on the tranny. Im still puzzled finding a b20 motor for my 88 accord. Something was also said about carb. b20's. I definitly want to stay fuel injected. Do you know where I can get B20 fuel injected? When eveybody finds out about this transmission Im interested on how to get the parts.


It sucks cause Im in the US.

snoopyloopy
04-22-2007, 07:31 PM
Hey carot man.. thanks for the info on the tranny. Im still puzzled finding a b20 motor for my 88 accord. Something was also said about carb. b20's. I definitly want to stay fuel injected. Do you know where I can get B20 fuel injected? When eveybody finds out about this transmission Im interested on how to get the parts.
It sucks cause Im in the US.
b20a was always fuel injected. however, since it uses the same intake manifold as a20a3/4 and the a20a3/4 and a20a1/2 have the same heads, then you can also bolt up an a20a1/2 carb to the b20a. however, it'll probably be a little anemic for it unless you at least upgrade the fuel pump to flow a little more. your best bet there would probably to run a dual weber setup. but since you're efi already, none of that really matters anyway. just make sure you either get the b20a wiring harness + ecu to make it easiest. or else, look up the other ways to get it in. carotman has a write-up on that too.

AccordB20A
04-23-2007, 04:44 PM
if you want a b20a ecu PM my frent 3gcvc i have like 34584389 that he can sell you. about the b series adaptor plates..... how many of those b series gearboxes have diffrent ratios. i hear some b16 manuals rev to 4000rpm at 100km/h instead of 3000 like every other honda.... tht wd be a fuel waster on a b20a right... but i spose only some b series boxes are like that..right or am i wrong??

snoopyloopy
04-23-2007, 05:01 PM
yeah, it depends on which one. i think the s80 tranny has the shortest gearing of all. but an ls tranny is probably good for a turbo b20a in these cars. otherwise, you won't get enough traction at all.

AccordB20A
12-25-2007, 12:42 PM
OK. has anyone actually done this besides me???
When i blew my b18 box back in the day i repiared it with a complete gearbox off an a18a engine and i have yet to try it out as it leaks oil.

will this gearbox i have work?!

RobT5580
12-25-2007, 07:37 PM
I have my eyes out for a A20 box to compare it to my b20a spare but i have not come accross one yet.

2oodoor
06-14-2008, 10:27 AM
posted from another thread thought i would add it to the list

I contacted my contact about this and this is what he says

Quote:
There is afew types of box on all those engine's the B18A can have A2N5 and E2N5 and B2K5 and the B20A can also have the B2K5 and F2K5 we would sell the gearbox's complete but if you could tell me how many people were interested I could check on the price of brand new bellhousings from japan as they might be a clearance item

So which box is it from the B18 that you guys need the bellhousing from the above box codes?
and how many people would be interested if the price was right?

this is if you guys dont copy the bellhousing but i think thats going to be a lot of money and time.

And then??
any updates on this?

Im wondering if the auto tx bellhousing could be used to make a template for a billet adapter plate. I need to look at some Jeep adapter plates to see how they do it.

A18A
06-14-2008, 04:01 PM
b18a with b2k5 gearbox?!?!?! didnt know they came with them, do they have the half shafts on them as well?

2oodoor
08-24-2008, 03:48 AM
Has anyone ever thought of custom made bellhousings? Wouldn't it be nice to have a new b-series transmission custom fit with a custom bellhousing instead of just an adapter plate?


Another option would be to cut b-series tranny bellhousings in 3/4 and weld it to the 1/4 part (the part that bolts to the block) of the stock bellhousing of your stock transmission. Although aluminum takes some skill to weld.

first off, I need to take a dramamine to get over reading this whole thread again, Im friggin dizzy..

.. HAS anyone actually done the B18 jdm bell housing only to A20xx 5 speed????with success?
please link it if you know of one. Other than matching part numbers up I can't tell if this is a worthy avenue. Help, looking for an actual successful hybrid accomplished.

OK now for the quotation ^^^ this lit up a lightbulb in my head, I asked this question before and was ignored on another thread... . What USDM bell housing is closest to the one we need for the B20A? A crossectional build would be fairly easy to do, cutting it in thirds or quarters and making things line up then weld it. Adding pieces in from a third bell housing to fill in, careful attention to structural integrity keeping it close to oem as possible, keeping PP clutch hardware and flywheel free and clear of the bell etc..

RobT5580
08-25-2008, 03:41 PM
I was thinking about this recently and i think our best bet is to adapt a newer b-series transmission to the B20A. It has been a solution for many other engine builds i might work on that sometime not in the near future but as i get time. Unless more B18 bell housings become available then were still stuck in a rut. Plus its all in making a template and having the piece cut and tapped.

2oodoor
08-25-2008, 03:53 PM
later model B series ? I wonder how far off at matching those are anyway...
If this automatic I have does not work out, I at least have a flange to start with for a template (?) using the auto txx bell housing as a pattern?

2oodoor
08-26-2008, 05:15 AM
I may have read something on this here already, not sure.. But I was looking at a CRV today B20B, it sits up right, not at an angle. How close, I wonder, is the transmission to matching on that.
I like the valve cover on those too

RobT5580
08-26-2008, 01:31 PM
I don't think anyone has really toyed and tried to match any transmssions up. I don't know how our luck would be but you never know what might work. But either case i think you could have a adaptor made for a few hundred dollors being its a single layer of metal.

AccordB20A
08-26-2008, 03:28 PM
D series is close. i think you can get the spline in and one bolt in when i tryed with an old DOHC ZC engines box

any b18 gearboxes i find will be available for purchase here.
i have successfully swapped a prelude gearbox onto the b18 bellhousing. Be sure not to mess the 1st and 2nd gear syncros up, they may look the same but 2nd gear will not work!!

RobT5580
08-26-2008, 03:34 PM
Let me know if you get another B18 bell housing because i definately need to do something because my B20A gears are way to short for boost.

cygnus x-1
08-26-2008, 07:51 PM
One thing that might make this easier, is to use the B20 flywheel and pressure plate, and the B18 clutch disc. Or see if The B18 disc and pressure plate could be bolted up to a B20 flywheel. Or even see if a B18 flywheel will bolt up to a B20 crank. This is what Acme Adapters does to get a VW diesel engine to mate up with a Suzuki gearbox. They modify a Suzuki flywheel to fit the VW crank, then there's a simple adapter plate that matches up the Suzuki bell housing to the VW engine.

C|

2oodoor
08-27-2008, 06:36 AM
D series is close. i think you can get the spline in and one bolt in when i tryed with an old DOHC ZC engines box

any b18 gearboxes i find will be available for purchase here.
i have successfully swapped a prelude gearbox onto the b18 bellhousing. Be sure not to mess the 1st and 2nd gear syncros up, they may look the same but 2nd gear will not work!!

VERY interesting, that was the reply I wanted to see, a successful bell housing swap.

Yes get Rob a bell housing so he will be able to sell me his transmission with short gears for my NA. yea yea

the transmission fitament.

markmdz89hatch
08-27-2008, 08:00 AM
Guy, thanks for digging this one up from the dead.

I'm going to pull this in a different direction for just a sec. Given that we've (theoretically) established that all the gearboxes have the same bolt pattern, and it's the bellhousing that acts as the "adapter plate" to mate the gearbox to the motors, I have to ask...

...does the B20A, or B18A (or any other gearbox sharing that same bolt pattern) have a factory LSD, or alternatively, have a readily available aftermarket LSD? I know there's one lone ranger out there that does make an aftermarket LSD for the A20 but I need to explore ALL options.

anyone?

edit: for those that need it drawn out (me included) here's what I put together for us to better understand what options we have.

...can someone please look over this diagram and verify that it reflects the facts we've established in this thread so far?

my goal is to add as many gearboxes as possible to the far right. The more we can add, the better options we'll all have for gearing, and aftermarket options...

cygnus x-1
08-27-2008, 11:48 AM
Whoa, whoa, whoa, wait a minute.... So what you're saying is that some of the A and B series gearboxes are potentially interchangeable? Meaning that we could maybe use a B18 gearbox with an A20 engine as well? Man would that be cool.

http://hondaswap.com/swap-articles/b-series-transmission-guide-29099/

C|

2oodoor
08-27-2008, 12:04 PM
This thread WAS exclusive to the B20 JDM 3rd gen accord and 2nd gen prelude. We have this issue, lack of availablity of manual trannys. Plenty of B20 made it to the US with automatics behind them, and those of us like me would ultimately rather have a 5 speed.
JUst clarifying that before any confusion develops. I have no problem with research and sharing the information of all 3rd gen accord transmisssion hybrids possible but it has the potential to develop into a hole nubba sticky.
(ps, this section does not smiley so.. ;o))

RobT5580
08-27-2008, 12:37 PM
The B16A differential fits the B20A directly i have the quaife unit in my car.

markmdz89hatch
08-27-2008, 01:09 PM
The B16A differential fits the B20A directly i have the quaife unit in my car.

Rob, is that just the diff, or did you bolt the whole B16 gearbox w/diff to the B20A bellhousing? Also, are you using a clutch spec'd for a B16 or B20? I wonder if the spline on the main shaft is the same with all of these trannys (B-whatever, as well as A20/A18)

Guy --> You're right about my comment opening up a whole new can of worms, but it's really just a reverse thought of what was started. I'm going to put the hush on my never ending questioning for right now. Once I get some sound evidence that that diagram is not just forward, but backward compatible as my hunch suggests, I'm going to post up a new thread with the findings.

Cygnus --> If you're willing, let's connect on PM to see if we can put our heads together and figure this one out. I have a few complete A20A 5sp trannys, an A18, and have access to a few B series (although I'll have to see exactly which B-series that is).

TWOLOUDNPROUD
08-27-2008, 01:39 PM
B2K5 ratios are:
1st 3.166 40.68MPH
2nd 1.857 69.35MPH
3rd 1.259 102.3MPH
4th 0.967 133.19MPH
5th 0.794 !62.2MPH
Reverse 3.000
Final reduction 4.066

And

F2K5 ratios are:
1st 3.166 40.68MPH
2nd 1.772 72.68MPH
3rd 1.185 108.68MPH
4th 0.967 133.19MPH
5th 0.794 162.2MPH
Reverse 3.000
Final reduction 4.066

And

93-01 GSR
S80/Y80 ratios are:
1st 3.23 37.14MPH
2nd 1.9 63.15MPH
3rd 1.36 88.22MPH
4th 1.034 116.03MPH
5th 0.787 152.45MPH
Reverse 3.000
Final reduction 4.4

RobT5580
08-27-2008, 03:57 PM
Im running just the differential with a B20A5 clutch. I do recall someone on preludepower running a B16/18 clutch but im not sure if it was mixed.

carotman
08-27-2008, 04:07 PM
markmdz89hatch, you will have to modify the diagram a bit.

You can't use the B18A or A20A bell housing on the B20A transmission. The B20A transmission can only be bolted to the B20A (or B18A) using it's own bell housing.

What can be done is use the B18A housing on the A20A transmission.

AccordB20A
08-27-2008, 04:25 PM
and dont forget the B18 we are talking about is a twin carb dohc 1.8 that also came in the accords kthx

markmdz89hatch
08-28-2008, 07:13 AM
markmdz89hatch, you will have to modify the diagram a bit.

You can't use the B18A or A20A bell housing on the B20A transmission. The B20A transmission can only be bolted to the B20A (or B18A) using it's own bell housing.

What can be done is use the B18A housing on the A20A transmission.

Ok, my brain officially hurts now...

...so, I can use the B18A bellhousing with an A20A gearbox (transmission), which means the reverse should also be true (ie. I can use the B18A gearbox (transmission) on the A20A bellhousing). Correct?

...so, i'm going to need some clarification, I thought the original point of the thread was to say that we could use the B18A bell-housing on the B20? I'm sooo confused. for now, I'm going to pull that diagram so I don't confuse anyone. As soon as I get it finalized, I'll repost. Can we connect over PM to get this all figured out.

TWOLOUDNPROUD
08-28-2008, 08:17 AM
Ok, my brain officially hurts now...

...so, I can use the B18A bellhousing with an A20A gearbox (transmission), which means the reverse should also be true (ie. I can use the B18A gearbox (transmission) on the A20A bellhousing). Correct?

...so, i'm going to need some clarification, I thought the original point of the thread was to say that we could use the B18A bell-housing on the B20? I'm sooo confused. for now, I'm going to pull that diagram so I don't confuse anyone. As soon as I get it finalized, I'll repost. Can we connect over PM to get this all figured out.

It not the USDM B18a it the JDM twin carb dohc B18a that also came in the accords . I need the JDM B18a bellhousing to for i can put my other B20a in my other Accord.

carotman
08-28-2008, 08:53 AM
Ok, I made a quick diagram that shows what works with what.

http://img246.imageshack.us/img246/4664/transdiagramae6.th.gif (http://img246.imageshack.us/my.php?image=transdiagramae6.gif)

cygnus x-1
08-28-2008, 09:39 AM
Ok, I made a quick diagram that shows what works with what.

http://img246.imageshack.us/img246/4664/transdiagramae6.th.gif (http://img246.imageshack.us/my.php?image=transdiagramae6.gif)


That's pretty good! Now my only question would be about USDM vs JDM. To me those are ALL JDM since they don't have the number on the end. Where do the USDM models fit in?

C|

2oodoor
08-28-2008, 09:58 AM
That's pretty good! Now my only question would be about USDM vs JDM. To me those are ALL JDM since they don't have the number on the end. Where do the USDM models fit in?

C|

I was going to say DUH, but I digress because EDM models could be identified as well. So I stand by you Cygnus! Thank you Carotman, that is a great start !

2ndGenGuy
08-28-2008, 10:02 AM
Isn't the implication of that chart more like A18Ax A20Ax B18Ax etc? I'm under the assumption that all the A series blocks and bellhousings are compatible with each other in regards to what's relevant to our cars. Might be gearing differences at the most across markets... Same goes for the B18A I imagine those are the same across JDM, EDM, etc, as well as B20A's. That list could become massive if you really wanted to list out everything. A20A1 A20A2 A20A3 A20A4, BT, BS, ET, ES, EZ, A18, A16, etc etc. There isn't really even an A20A engine is there? I think it's best to keep it simple unless there are differences.

carotman
08-28-2008, 10:39 AM
Yes, I wanted to keep this simple. All the A series for our cars have the same block casting. Same goes with the B series made for our cars.

cygnus x-1
08-28-2008, 07:42 PM
Yes, I wanted to keep this simple. All the A series for our cars have the same block casting. Same goes with the B series made for our cars.

So if I understand correctly, a B18A1 transmission from an LS Integra will fit on the B20A block? If that's the case then there should be no problem finding transmissions for the B20A.

It also means that I could use an LS Integra gear box (or any other B18 gear box) in place of my A18 gearbox. That would be seriously cool! More gearing choices and an LSD! Woohoo!

C|

A18A
08-28-2008, 08:03 PM
just the b18a not the b18a1

MessyHonda
08-28-2008, 11:41 PM
you could also run integera gears with it.

thegreatdane
08-29-2008, 02:22 AM
There isn't really even an A20A engine is there?.

Actually there is, I used to have one :)

A18A
08-29-2008, 02:55 AM
i also believe they are in all jdm ca5 accords?!?1/.>?!

markmdz89hatch
08-29-2008, 03:59 AM
right, ok, so based on that diagram (thanks Carot) I think I'm just repeating what you said on that first post, but the B18A bellhousing is the missing piece to the puzzle that will open up a serious amount of options for all the B20A guys out there that want to move their auto to a 5 spd.

But that also opens up options for us A guys on which tranny we want to run. I already knew the A18/A20 were interchangeable, but now we also have the option of the B18A, which could be cool too. ...more importantly, that 'may' open up other options for us on the B series front for direct bolt-ons. We'll have to see.

A18A
08-29-2008, 06:25 AM
it's just a B18A gearbox, the B18A engine is a completely different engine from a B18A1, and gearboxes are not interchangable between them

cygnus x-1
08-29-2008, 12:01 PM
it's just a B18A gearbox, the B18A engine is a completely different engine from a B18A1, and gearboxes are not interchangable between them

Ok, that's why I asked about USDM vs JDM/EDM. I know that B18A is not the same as B18Ax. But Carotman said:



Yes, I wanted to keep this simple. All the A series for our cars have the same block casting. Same goes with the B series made for our cars.So in the diagram A20A could also mean A20A[1/2/3/4] as far as the engine blocks. But not so for the B18A and B18A1? This is why I'm confused.

I guess in the end all I really want to know is if I can put any other gearbox on my A20Ax engine and A20Ax bellhousing.

Or should I just go away? :lol: <--(WTF? Are smilies disabled in this thread?)


C|

2ndGenGuy
08-29-2008, 12:16 PM
I think Carot's chart is only in relation to what came in 3g Accords and 2g Preludes. Sooo.... if someone wanted to expand on that, then we'd want to start adding in the other stuffs or make another chart. We know Carot's chart is 100% true, but we haven't discovered first hand what works as far as other gearboxen outside the mid 80's Accord/Prelude family. Or did I miss that part somewhere else in the thread?

:) <--- SRSLY WTF!

cygnus x-1
08-29-2008, 01:03 PM
I think Carot's chart is only in relation to what came in 3g Accords and 2g Preludes. Sooo.... if someone wanted to expand on that, then we'd want to start adding in the other stuffs or make another chart. We know Carot's chart is 100% true, but we haven't discovered first hand what works as far as other gearboxen outside the mid 80's Accord/Prelude family. Or did I miss that part somewhere else in the thread?

:) <--- SRSLY WTF!


Ohh, I think I see what you/he means now. There was no B18Ax in any 3g Accord or 2g Prelude, so those don't count. There was a 3g Accord B18A but not a B18A1. Got it.

C|

markmdz89hatch
09-02-2008, 02:26 PM
i just got a migrane.

Civic Accord Honda
09-02-2008, 04:15 PM
i just got a migrane.
:werd:

AccordB20A
09-10-2008, 07:45 PM
and i have one for sale now 300 shipped kthx

KiwiDave
02-09-2009, 03:37 PM
Hey All, Have got a Honda Accord B20a motor here in NZ. The auto has decided to die on me - it's done 280,000kms so can't complain. Thing is I want to replace the tranny cos I've really looked after the car. So have searched the site and found Carotmans guide re: which trans comes from which Chassis/ Engine. According to that it should be the F4-6000001 transmission. Question is; I can't get hold of an F4 so can I use one of the N6 transmissions and just bolt it on and go without any mods? Appreciate any help on this and apologies if I shouldn't have tagged this onto this thread. Cheers, Dave

Steve_Si
02-09-2009, 03:54 PM
Just get a 5 speed box from another 2.0Si. You'll need pedal box, shifter, linkages and the 1/2 shaft + obviously the tranny, clutch, clutch cable etc.

The 5 speed box from the EXL-S does not use a 1/2 shaft and is prone to bad torque steer when paired with a B20A.

This entire thread is about pairing a USDM 5 speed with a JDM B20A. You should be able to find the JDM 5 speed easily enough! Didn't take me long :P

AccordB20A
02-09-2009, 04:10 PM
Hey All, Have got a Honda Accord B20a motor here in NZ. The auto has decided to die on me - it's done 280,000kms so can't complain. Thing is I want to replace the tranny cos I've really looked after the car. So have searched the site and found Carotmans guide re: which trans comes from which Chassis/ Engine. According to that it should be the F4-6000001 transmission. Question is; I can't get hold of an F4 so can I use one of the N6 transmissions and just bolt it on and go without any mods? Appreciate any help on this and apologies if I shouldn't have tagged this onto this thread. Cheers, Dave

two words, MANUAL SWAP lol

either that or buy my auto box from me off trademe :P

AccordB20A
02-09-2009, 04:11 PM
Just get a 5 speed box from another 2.0Si. You'll need pedal box, shifter, linkages and the 1/2 shaft + obviously the tranny, clutch, clutch cable etc.

The 5 speed box from the EXL-S does not use a 1/2 shaft and is prone to bad torque steer when paired with a B20A.

This entire thread is about pairing a USDM 5 speed with a JDM B20A. You should be able to find the JDM 5 speed easily enough! Didn't take me long :P

If he is from the south island he should be able to find a manual swap piece of piss as most accords down there are manual, up north here they are all fail and automatic

Hauntd ca3
02-09-2009, 08:52 PM
domt see many manual si accords down here
most are like mine and converted from auto .
talked to a wrecker mate a while back and its getting hard to find b2k5 boxs down here now.
and finding black top b20a accord motors is starting to get hard to
and where you from kiwi dave?
mainlander or that other island up north

AccordB20A
02-09-2009, 09:39 PM
domt see many manual si accords down here
most are like mine and converted from auto .
talked to a wrecker mate a while back and its getting hard to find b2k5 boxs down here now.
and finding black top b20a accord motors is starting to get hard to
and where you from kiwi dave?
mainlander or that other island up north
lol your south island used to be good till chch moved in
i would also like to know what island hes from, also who cares about finding blacktop motors, gold top motors are the win engine :)

Hauntd ca3
02-09-2009, 10:25 PM
haha, tell me bout chch mate
bout my least fav city after auckland.
waayyy to busy for me
to fast, gimme slow laid back invers anyday
gold tops are poolude motors so can stay in pooludes

KiwiDave
02-10-2009, 12:40 PM
I'm from the North Island. The motor is a gold top and runs well but the body is falling apart so won't be converting to manual.

AccordB20A- you said your box was an L4 so can't use.

Anyone know for sure whether I can use the N6 transmissions instead of the F4? Carotman are you around? You seem to know the most - any idea? Have searched the forums and can't find the answer. Should I start another thread?

AccordB20A
02-10-2009, 01:03 PM
well a b20 gearbox fits any accord b20a so it will still work, mines probably out of a 2g prelude but it will still work on any accord

A18A
02-10-2009, 01:20 PM
well a b20 gearbox fits any accord b20a so it will still work

3g prelude b20 gearboxes don't :P

AccordB20A
02-10-2009, 09:44 PM
3g preludes arent in out vocabulary , they are not counted as they are B20A5 motors and therefor fail

Hauntd ca3
02-10-2009, 10:09 PM
pooludes man
get it right, P O O L U D E S

AccordB20A
02-10-2009, 11:10 PM
pooludes man
get it right, P O O L U D E S

yeah poolude lol

you best replace that intake and ecu man, blacktop engines are as close to the poolude b20a5's as hell lol

Hauntd ca3
02-11-2009, 08:22 PM
yeah poolude lol

you best replace that intake and ecu man, blacktop engines are as close to the poolude b20a5's as hell lol

my motor leans forwards, not backwards
thats far enuff removed from a 3g poolude for me

MessyHonda
02-12-2009, 07:30 PM
so can i still use the b20a5 lighten flywheel with the a20 clutch? for the b18 housing?

bullard123
02-12-2009, 08:35 PM
so can i still use the b20a5 lighten flywheel with the a20 clutch? for the b18 housing?

The B20A5 flywheel won't work with the A20 clutch

AccordB20A
02-17-2009, 07:00 PM
not to mention the starter motor wont engage on it. you have to use a 1986-1987 gold rocker covered A20A clutch with a recessed flywheel. it is the only a20 flywheel that fits the B20A

OldSchool86
04-08-2009, 09:59 PM
That's right. I found THE solution to the B20A "RARE" transmission.

We all know that the B20A can be somewhat easy to find but finding the 5 speed transmission can be a real challenge.

I've noticed that the B18A (The B20A little cousin) has a transmission configuration really similar to the A20A. I've been wondering for some time if the B18A transmission is similar to the A20A. Well, it turns out it shares the same fucking tranny case and cover. Excuse my language but I'm so amazed by that discovery that I don't know why I didn't look into this earlier.

I checked my JDM parts catalog today and compared part numbers with the B18A.

Here are some revelant part B18A numbers:

Tranny case: 21200-PC8-J52
Tranny end cover: 21310-PC8-961
Tranny end cover gasket: 21395-689-000
Oil Seal: 91206-PC8-003
T/0 Bearing: 22810-PC8-921
Mainshaft: 23211-PC8-J30
Countershaft: 23220-PC8-671
Fork, Low Gearshift: 24221-PC8-920
Differential Case: 41310-PC8-621


I know it may seem late for this post but its the first that i've seen it but my A20A1 5speed tranny case # is not the same. mine is 21200-PC8-J00. am i missing somthing?

OldSchool86
04-08-2009, 10:08 PM
what i have found is:

86 only had the 21200-PC8-J00
87 had both the 21200-PC8-J00 & J52
88-89 Had only the 21200-PC8-J52

What is the defferance between the two tranny's?

Ichiban
04-21-2009, 07:43 PM
what i have found is:

86 only had the 21200-PC8-J00
87 had both the 21200-PC8-J00 & J52
88-89 Had only the 21200-PC8-J52

What is the defferance between the two tranny's?

This would be good to know. My tranny came out of an 87 twin carb lude, but since it has the larger 3g sized splines, it's either been swapped, or is some sort of factory botch job.

Also, Aaron, you want to sell me a B18a bellhousing without speedholes and JB weld all over it?

markmdz89hatch
04-21-2009, 07:59 PM
This would be good to know. My tranny came out of an 87 twin carb lude, but since it has the larger 3g sized splines, it's either been swapped, or is some sort of factory botch job.

Also, Aaron, you want to sell me a B18a bellhousing without speedholes and JB weld all over it?

If I'm not mistaken, the 87 lude's came with either the A18 or A20, and I'm pretty sure the 87 Si Lude was the one with the dual carbs and was an A20. Long story short, same splines.

I have one in my garage and I'll check it out in the next few days and come back with that code too.

AccordB20A
04-21-2009, 09:26 PM
lol i told you that gearbox had many holes, but im sure you will fix it up

Ichiban
04-21-2009, 09:45 PM
lol i told you that gearbox had many holes, but im sure you will fix it up

It's almost completely fucked out. Turns out JB weld actually has a greater hardness than the aluminum, making it pretty much impossible to grind out. Also, there are 3 or 4 trashed bolt holes, and the bore for the oil seal is, well, mostly missing. Oh and the 3 big holes.

I can put a bunch of time into restoring this bellhousing, but all the welding may distort it to the point that it kills bearings all the time or just won't seal. I'm kind of hoping to get another one in decent shape if at all possible.

carotman
04-22-2009, 04:53 AM
Maybe you can use that stuff:
http://www.aluminumrepair.com/

Seems less prone to distorsion.

OldSchool86
04-26-2009, 08:45 PM
Ok I'm trying to get the B18A bell housing from Honda. what is the B18A bell housing part#

AccordB20A
04-27-2009, 03:00 PM
i have no ideas and i do not think honda will stock such and old part.

2oodoor
04-27-2009, 03:18 PM
Ok I'm trying to get the B18A bell housing from Honda. what is the B18A bell housing part#

hey dude did you buy that motor from ebay last month?
It was in the atlanta area, just wondering.

AccordB20A ^^^ can hook you up possibly with that item

Ichiban
04-27-2009, 05:57 PM
Maybe you can use that stuff:
http://www.aluminumrepair.com/

Seems less prone to distorsion.

It's already welded. Doesn't seem to have warped more than a few thou, and the gasket will make up for that. Gonna plane the engine side flat on the mill, just to avoid any undue stress.

AccordB20A
04-27-2009, 06:14 PM
getting hard to find the old b18 accord as all the b18 motors have all blown up and been scrapped now. there was one on trademe but do you wanna pay 400US for it? lol

OldSchool86
04-28-2009, 08:34 AM
getting hard to find the old b18 accord as all the b18 motors have all blown up and been scrapped now. there was one on trademe but do you wanna pay 400US for it? lol

400us for the tranny? I would be willing. this motor is no good without a tranny, unless i make an adapter plate.

OldSchool86
04-28-2009, 08:35 AM
hey dude did you buy that motor from ebay last month?
It was in the atlanta area, just wondering.

AccordB20A ^^^ can hook you up possibly with that item

yes i did.

AccordB20A
04-28-2009, 12:44 PM
lol i was looking on trademe and i cant seem to find the car thats b18 manual anymore.

2oodoor
04-28-2009, 02:31 PM
this auto hooked up to mine (b20a) is still being loads of fun, and is much more power than before even with the mods on my A20. This thing will tote the mail and drag the dog... lol

OldSchool86
04-28-2009, 06:41 PM
this auto hooked up to mine (b20a) is still being loads of fun, and is much more power than before even with the mods on my A20. This thing will tote the mail and drag the dog... lol

well i've got the auto trany that it came with. but i'm not about to convert my car to auto just to solve my trany issue. i'f your looking for an extra one let me know

Ichiban
05-19-2009, 05:09 PM
Some info on this: The JDM B18A bellhousing has a pressed in roller bearing that differs slightly from the USDM A-series tranny.

JDM bearing- NSK 8E-NK 33x55x21

USDM bearing- NSK 8E-NK 33x55x19

Because I destroyed the JDM bearing whilst removing it, I machined a 3mm spacer to fit behind the other one, in order to locate it properly within it's bore.

hammer3rd
10-08-2009, 12:11 AM
Has any one actually done this,jdm b18a bellhousing with a usdm a20a tranny on a jdm b20a motor. If so I would like to know how it worked out as I want a 5 speed to go with my swap.

AccordB20A
05-15-2010, 09:27 PM
^^ posted last year and no one helpted him out. i had a 2nd gen prelude casing and internals bolted to the bellhousing i sold mike, it drove good as i just neded to keep topping up the oil cause it dripped out haha

i have another one of these bellhousings if anyone is interested, gearbox is still in one piece

Slipup
10-22-2010, 05:51 PM
How much do you want for the bellhousing? Send me a PM if possible.

AccordB20A
10-22-2010, 08:27 PM
i cant sell it atm as its my only gearbox :(

Slipup
10-23-2010, 06:43 PM
Crap lol. Well I have a buddy in Okinawa but he said he isen't in the mainland so its harder to get stuff. I just hit him up to see if could get me a few things anyhow. What model/years car did this engine come in so I can give him a better idea when he goes looking.

AccordB20A
10-23-2010, 07:29 PM
85 to 89 accord ca2 for the correct bellhousing, but if you want a complete gearbox BA1 prelude or CA3 accord will work.

Slipup
10-23-2010, 07:47 PM
Thanks.

-HiTMaN-
01-19-2011, 08:58 AM
This makes me wish i never sold my 86 hatch LX-i

fmn716
01-30-2011, 08:53 AM
Good FIND!!!

I am only confused about 1 thing, will the B18A Gearbox work with the half shaft ?

Ichiban
01-30-2011, 10:55 AM
If you machine the bracket it does.

stardogchampion
08-17-2020, 05:15 PM
Bringing this back from the dead. So I have the B20a and am looking for the "undesireable" automatic transmission. If anyone still has one, please let me know. At this point, if anyone has the 5-speed, I would be interested in that as well.