[FamilyMan]

Hello,I have a '69 Muncie M-20 (case 3925660,ID P9D15A) that is in need of parts replacement (1st gear, input shaft, and counter gear). I have seen some good prices for complete M-22 gearsets available. Is it possible to convert to the stronger gearset without any additional purchases? My application is a street/strip '69 Camaro convert. with a mild (400hp) 396 and 4.11 gears (12 bolt) running 9" ET Drags in strip trim. Has anyone enjoyed reasonable reliability with a combination such as this? (Full M-22 gear sets are available on E-Bay for $685, cost for my standard repair is $325. This is what piqued my curiosity.)

[ March 30, 2003: Message edited by: FamilyMan ]

[ March 30, 2003: Message edited by: FamilyMan ]</p>

[ztoy]

I am no tranny man but I would think that in a sweet setup like it sounds like you have, you would want a close ratio tranny such as a m-21 or m-22 close ratio
I wouldn't be surprised if , with the correct parts, you could convert the 20 to a 22, but the best thing to do is go to a local trushworthy tranny shop and check with them. Most shops will have someone there who can rebuild them and who can give you the info you seek.
Good luck!

[BOBCRMAN@aol.com]

it is not cost effective, the price of all new M-22 gears would be prohibitive.

[FamilyMan]

Hi,thanks for the input. I received a message from Larry at D&L Transmissions. The Muncie will hold any gears set with a 1" mainshaft. A 1st gear blowup like mine will often lead to an out of round rear bearing bore indicating a terminal future for the trans case. I'll measure for out of round and make my decision. Thanks.