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I would like to know if my muncie is a M22 because the guy that I bought the car from said that is what it had in it. The code that I read on my tranny was: P7T097.
I read in another post that someone had a muncie with the code P9D01B.
P=muncie
9=1969
D=April
01=day
B=M21 (A=M20, B=M21, C=M22)
But you see this does not help me because my last code is 7 not a letter. How can I tell what type of muncie I have?
 

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I don't know what the last "7" could be on your code, but this is what I get...
P7T097
P-Muncie
7-1967
T-December
09-9th day

The only way to know what this trans is, is to pull it out and look at the rings on the input shaft...if there's no rings around the input shaft, then it could be a M22. The only positive way to tell, if there is no rings, is to pull the side cover off and check the angle of the gears.
One ring=M21 close ratio
two rings=M20 wide ratio
No rings=Early M20 wide ratio, or M22 rockcrusher. Have to pull the side cover to verify.

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'70 LS6
'69 Camaro Indy Pace Car
'68 Elky 396/375 M22
'69 Chevelle SS396/375
Wanted- '70 GTO Judge!
 

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The letter at the end of the date code didn't begin until about Oct 68. The last 7 is unknown to me. Look again to be sure it isn't something else.
Dave is on the money with everything else.

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Tom Parsons
 
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