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Thread: PROJECT: A20A to B18A Tranny Adapter Plate

  1. #51

    89T's Avatar
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    Re: PROJECT: A20A to B18A Tranny Adapter Plate

    It should be there today.

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    un-motivated!
    someone make me an offer i just could not say no to.

    3GR



  2. #52
    LXi User obd0driver's Avatar
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    Re: PROJECT: A20A to B18A Tranny Adapter Plate

    Unboxing video I made

    https://youtu.be/lm35JeqHJAY

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  3. #53
    LXi User obd0driver's Avatar
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    Re: PROJECT: A20A to B18A Tranny Adapter Plate

    ****Bump update****01/05/2020

    Well it been a week and a busy one at that. I was did some traveling to my inlaws and wasn't able to work on this tell Friday. But fast forward to 2020 and we have some success. Lots to cover so here we go(photos will follow full detailed video in the next weekish).

    First things bolts finding them was a but harder then I thought. Fine thread metric bolts is impossible local and online they have little to no real information on length so ordered them and can be a chance at best. I called a bunch of place last Monday to chase down the flywheel bolts and not even arp could help the sent me to the company's that make there bolts and they didn't have what was needed. So once I got back home started the search locally and had about the same success. I reached out to allen and he was able provide me with part's numbers for OEM Hondas flywheel bolt at Both 40mm and 45mm
    Length.(I will provide the number once I have the bolts). I went to my local dealer where they were able to order me one of each to test fitment and that will happen Tomorrow and I will order the rest(7 out of 8) to be here next day couple days.

    As far as the socket head bolts needed to mate the plate to the head nothing in the right length locally.
    but I found some(m10x60mm) that would require some trimming and re-threading of the shoulder. After that I should end up with a 4 m10x29mm 1.25 pitch socket head bolt to bolt the plate to the block and clear the transmission. But these definitely would need be ordered I just wanted some for testing before I bought something that's gonna be hard to return if they were incorrect. Also they dont make a 29mm long bolt.(this part still needs to be worked out 100%). But m10x30mm bolts are easily found online and trimming 1mm shouldn't be hard thing to do once I learn how to that is lol.

    T-bracket/rear mount seem to fit the stock A series with a bit of modifications. First the bolt holes have to be stepped up to fit the larger bolts for the b series transmission. Next there may need to be a bit of cutting on the transmission of the bracket to clear then trans but that easy fix(not totally sure this will need to be done see next part) and the same with the bolt area where b series bolts go in due to the size of the heads on the bolts. So its trim of new bolt either way it's not hard.
    The second part of the t-bracket(rear mount) is there would need be a spacer to make up the difference between the mount and transmission. This shouldn't be a issue due to the fact that this is a test plate so the material can be left or added to the final version of the plates. Seeing how the axle hole has to be cut in the same general area the plate has to be redone not matter what.

    I also but the starter in and it clears the plate so that's great news. Just need the flywheel wheel bolts to test engagement of the starter and flywheel so more to come here.

    I also took some time to get my accord back on all fours and removed the engine for the most part. So the bay is not freeish to test fitment. Just gave bought a hoist that can hold all the weight because this setup is heavy af.

    So I've let allen know of the changes that will need to be made and there are still something's that need to be worked out but progress is progress and I'll continue to plug away at it.


    *update flywheel bolts*01/07/2020
    So 40mm bolts are gonna be the ones. The bolt can be trimmed a hair, the spacer can be made a hair thicker or a crush washers can be added. There are a couple work arounds for these so its really a non issue. Each will effect where the flywheel sits in relation to the starter so there's bit more investigation but nothing major.

    So with that being said the part number is 90011-PGE-000 they cost $4.82 each $38.56 for the set. You can get then next day from the dealer in most cases. These came from a 03-07 accord so technically you could go to the jy and get a set because these are no stretch bolts and can be reused for those of you on a budget.

    Heres a sample. The world's first look at a2b awd trans swap.



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  4. #54
    LXi User obd0driver's Avatar
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    Re: PROJECT: A20A to B18A Tranny Adapter Plate

    So did a thing. Well kinda I was able to drop the A2B setup in today. There's some issues with space in the rear the trans hits the rear sub frame nothing a bit hammer can't fix and the trans sits on the radius arm from the front cross member. I would assume that this is a problem for AWD trans but not for the Fwd. So with that being said I will test a Fwd and go from there. Also the front and rear mount seem to line up with little to no problems. The drivers side will need to move but this is because of where the trans is hitting. Cheers

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  5. #55

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    Re: PROJECT: A20A to B18A Tranny Adapter Plate

    Quote Originally Posted by obd0driver View Post
    So did a thing. Well kinda I was able to drop the A2B setup in today. There's some issues with space in the rear the trans hits the rear sub frame nothing a bit hammer can't fix and the trans sits on the radius arm from the front cross member. I would assume that this is a problem for AWD trans but not for the Fwd. So with that being said I will test a Fwd and go from there. Also the front and rear mount seem to line up with little to no problems. The drivers side will need to move but this is because of where the trans is hitting. Cheers

    Sent from my SM-N950U using Tapatalk
    Good job

    Sent from my SM-G935P using Tapatalk
    un-motivated!
    someone make me an offer i just could not say no to.

    3GR

  6. #56
    LXi User obd0driver's Avatar
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    Re: PROJECT: A20A to B18A Tranny Adapter Plate

    Here the latest.

    https://youtu.be/PqeX0BnXStQ

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