Trans decode help

[Schonyenko2]

I got this off an M22 reads P1PO3C. Nbr on other side of case 9976171 and the metal tag nbr 978766 WO
I know it's a M22, but what else does it decode out as? Thanks, Schonye

[Bill Pritchard]

P1P03C...

P = Muncie 4 speed, alum case
1 = 1971 model year
P = September assembly month (in this case, September 1970)
03 = day of assembly (9/3/1970)
C = M22

Is that 9976171 number cast or stamped? If it's a main case casting number, I have no idea what that's from, and it sure blows the P1P03C number out of the water.

Can't help you on the tag number.

[enio45]

Crash - where are you?

[Schonyenko2]

The 9976171 is stamped. I felt that was the Vin nbr. The rest , as you decoded was what I thought, but wasn't sure.I didn't see a provision for a TCS plug in. Shouldn't there be on on a 71 trans?

[Bill Pritchard]

That number is not consistent with any type of CON VIN from a 1971 model GM product. The CON VIN format should be N1Lnnnnnn, where

N = a number designating the GM division of the car (Chevrolet would be 1, and I believe Pontiac is 2)
1 stands for model year 1971
L = a letter designating the vehicle assembly plant
nnnnnn = the last six digits of the sequential VIN of the car

Colvin's book makes no mention of anything regarding the TCS switch provision

[Schonyenko2]

The M22 that I had in my deuce had a provision for a TCS plug in. I'll have to look again, but I don't remember seeing it on this one. I agree those numbers I gave really don't appear to be a sequential vin number, but it's the only other stamping in the main case.
A friend of mine is wanting to sell it, but he wanted to be able to tell a prospective buyer what it came out of. I'm not sure were going to find out.

[crash]

If your going to look at it again??? Get all the casting numbers... And check the tag number, it should start with a 3 not a 9... Crash