Need help identifying a Muncie 4 Speed [Archive] - Chevelle Tech

: Need help identifying a Muncie 4 Speed


Donny Moore
Jan 1st, 99, 2:19 PM
Need help id'ing a Muncie 4 speed I picked up at a local swap meet. Was told by the seller that it's an M21 from a '70 Camaro. Does anyone know of a way to physically ident the tranny as an M20, M21 or M22? On the side of the flange is stamped "P9A02A" and on the bottom of the flange is "29G125416". The input shaft has 10 splines with 2 grooves or rings.

Gary S
Jan 1st, 99, 3:51 PM
The P9A02A decodes as:
P=Muncie
9=1969
A=January
02=2nd day of month
A=M20

Larry
Jan 1st, 99, 6:13 PM
M-20 wide ratio:
Cluster gear teeth--25-22-19-17
Input shaft gear teeth--21

M-21/22 Close ratio:
Cluster gear teeth--27-22-19-17
Input shaft gear teeth--26

John
Jan 1st, 99, 6:23 PM
Check out gearzone.net (http://gearzone.net) .They have details on muncies plus very good rebuild kits and parts.
John

Dave Birdwell
Jan 1st, 99, 7:32 PM
Trans is out of a '69 Pontiac, most likely LeMans/GTO

2-Pontiac division
9-1969
G-assembly plant
125416-sequential VIN matches dash number of car installed in