m22 how to tell from m21?

[wheelhop]

I called a buddy out in California who rebuilds these all the time and here's what he told me, please excuse me in advance if something was lost in the translation:

On 1966 and newer muncie transmissions, the input shaft on a M-22 did not have a ring around it. M-21's had 1 ring, M-20's had 2 rings. This is of course is assuming the input shaft is original to the trans.

On the passenger side of the main case of the trans, there should be a C-code somewhere near the v.i.n..

Inside of the trans, the gears are cut at a straighter angle.

M-22's could have been fine or course splined.
The fine splined ones were produced between 1971 and 1974

any questions or need help rebuilding your trans call Craig Wright of "The Wright Connection" @ 661-304-1967

[427king]

[ QUOTE ]
On the passenger side of the main case of the trans, there should be a C-code somewhere near the v.i.n..

[/ QUOTE ] If a C case is rebuilt using m20 and m21 replacement gears ,it will appear as if its an m22 until you open it up so that is not a great indicator oif whats inside,also fine splines started in late 70 model year not 71. The easiest rule of thumb is if it has rings it isnt an M22,otherwise you need to see the gears to be sure.

[vettem]

my buddy just bought a rebuilt m22 from a guy in ct. real good price. 20 degree angle gear.

[wheelhop]

Ct. ???? huh, isn't that where 427King lives????

[427king]

[ QUOTE ]
Ct. ???? huh, isn't that where 427King lives????



[/ QUOTE ] Yeah, but he said "real good price" so that eliminates me as the seller

[wheelhop]

I was thinking that but couldn't say it!!!!

[vettem]

would you one sell for 1200.?(rebuilt)