Muncie Question

[SamLBInj]

In my 69 Z/28 I have an M-22 dated P9M28. My car is an X-33 06A and through process of number calculations was built close to June 19th. My question is, there is no C code on this trans, no Vin, and its shows the wrong month, would this be a replacement? should have a Counter exchange number correct? or could have the original owner just gone to chevy parts and buy one and put it in and thats why it doesnt have the c-code? was this code only used for new builds and not over the counter buys?
Sam

[Salvatore]

How do you know it is an M22! Maybe the original case broke and the owner had to buy one from GM years ago. I never saw any particular numbers on a warranty or counter sold trans, but of course I haden't seen them all. Sam

[SamLBInj]

[ QUOTE ]
How do you know it is an M22! Maybe the original case broke and the owner had to buy one from GM years ago. I never saw any particular numbers on a warranty or counter sold trans, but of course I haden't seen them all. Sam

[/ QUOTE ]
When I got the car back in 81, I checked it out, but wasnt very interested in trans numbers back then so it didnt matter. Ill tell ya, there is no mistaken the sound of a rock crusher..Ill be pulling it again next month and maybe I can figure it out..
Sam

[Salvatore]

You are right about the sound. Let us know what you find. Sam

[crash]

Sam, Muncie's didn't start the A-B-C ratio coding until end of Oct. or begining of Nov. of 1968 calender year. Your trans was built Aug. 28 1968 for use in a 1969 model year car. I have an N.O.S. M-21 built P9M24 without an A-B-C code. 1967 and older transmission sold over the counter had just a P# build date, some time in 1968 over the counter transmissions got the CT8 and a 5 digit number with the P#. So yours might be early enough and didn't get the CT8 code...Hope this helps...Crash

[Salvatore]

Crash, His car is an X33 06A, so this trans won't be original to his car if the trans was a late August build. Maybe a warranty job laying on the shelves? Sam

[SamLBInj]

Is it possible it is original, or just way to old? could it sit on a shelf for 9 months. Was there a cetain date they built the M-22's and stock piled them since they were not put in many cars? I have another 06a and it has a m-21 dated in may..this one has me stumped....
Sam

[Salvatore]

Sam, I am no expert. I think it is a little old. You should ask Jerry MacNeish or BKH. It is usually within 2-3 months of the build date. Should have your cars VIN on it also. I think it was an over the counter trans. from GM. Sam

[Kurt S]

It's not original to the car.