Can anyone tell me the 7 digit GM ID number for a 71 350/270 transmission, please. Greatly appreciated and thanks!
C3 - Trans Number
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Re: C3 - Trans Number
Greg,
There are actually 3 different casting numbers used on the Muncie manual transmissions. Since you own a '71 ZQ3 car I going to assume you have a M20 wide ratio 4spd transmission. The numbers you are looking for are maincase 3925661, extension housing 3978764, & sidecover 3952648.
To identify if this transmission was assembled for use in a 1971 model Corvette, you need to decipher the assembly stamping. An example for '71 model year would look something like this... P10321A- Top
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