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
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!
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