View Full Version : what tranny?

john wilson
02-14-01, 02:26 PM
I would like to know what tranny is in my 80 corvette it's a 4 speed but which one???

02-14-01, 03:04 PM
There is a lot of experience here, I'm sure someone can quote #'s and get you the information you seek. Here is what I can contribute, The MM4 came in two options, the first was the T10 or the standard BW 4-speed transmission, then there was the T21 option, this was the close ratio and I believe also known as the 83mm 4-speed. My '81 has the T10, and is fresh after new second gear, main shaft, bearings and synco's.

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02-20-01, 08:46 PM
John ~ regardless of what 4spd is in your 80...Rare81 will
know that I'm now in a funk. Gee...an 80 with a 4spd...how sweeeeeeet !!! :D

the DoG