Thread: M-22 vs. M-21
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Old 07-26-2006, 09:46 AM
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Lloyd-TX Lloyd-TX is offline
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Quote:
Originally Posted by rwinkles
I agree with gtos, I believe the M-22 was available in Chevys in 1970 and before (back to 1966 I think) but only available in Pontiacs in 71 & 72 behind the 455 HO's.
RW is absolutely correct concerning the model years that Pontiac offered the M22 transmission, and it was indeed the ONLY 4-speed available with the 455HO engine in both A-bodies and Firebirds.

However, it was also offered as an option on the 400 4V Formulas and A-bodies as well.

As an example, a friend of mine here in town has a tired but all original '71 Formula 400. M22 with a 3.73 diff. It's obviously a non-A/C car with those gears!

FYI, 1971 and 1972 D-port 455's were offered ONLY with the M40 automatic.

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