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Old 01-14-2008, 05:33 AM   #1
OLDCHEV4X4
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Join Date: Apr 2000
Location: Chester County PA, USA
Posts: 1,228
Th400 Id

I have a th400 trans i just picked up and i need help with the numbers.
On the tag it reads: 345 74-CM 5883
This is what i think so far:
345=day of production = Dec. 12
74=1974
C= Chevrolet
M= ?
5883= the 5883 th400 made in that year.
Do i have this right??
What does the M denote? I'm thinking application.

Cast into the case near the motor is a 13.
It has a 4" extension housing.
It has a "original GM looking" shifter cable and brackets on it.
Thanks for any help.
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Glenmoore, Pennsylvania
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