I found the solution to the B20A "RARE" transmission.

[cygnus x-1]

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]

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]

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]

i just got a migrane.

[Civic Accord Honda]

i just got a migrane.

:werd:

[AccordB20A]

and i have one for sale now 300 shipped kthx

[KiwiDave]

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]

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]

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]

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]

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]

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]

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]

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]

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]

well a b20 gearbox fits any accord b20a so it will still work

3g prelude b20 gearboxes don't :P

[AccordB20A]

3g preludes arent in out vocabulary , they are not counted as they are B20A5 motors and therefor fail

[Hauntd ca3]

pooludes man
get it right, P O O L U D E S

[AccordB20A]

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]

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]

so can i still use the b20a5 lighten flywheel with the a20 clutch? for the b18 housing?

[bullard123]

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]

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]

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]

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?