Quote:
Originally Posted by 'ol Pinion head
The numbers the OP gave are out of (a) ... Pontiac Master Parts book. ...
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Thanks!
That was my guess, but my knee-jerk reaction was that the logical numbers to use for determining the correct transmission might be the main case casting numbers, or maybe tail housing casting numbers - not a part number that has gone obsolete with time.
Would either of those 478--- numbers be observed on a Muncie ID tag?
(which would have also had the transmission code)
I might not know much about GP's, but that doesn't mean I'm not interested;
I would have thought that finding an four speed in the GP would have meant it was the M20.
I take it both of those part 478--- numbers were used for the M21.
Sorry for disrupting the conversation.