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#1
07-25-2006, 05:14 PM
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M-22 vs. M-21
For some strange reason I always thought my '70 455 (3.31 rear) 4-speed was a M-22. Now years after doing the research i can't for the life of me figure out where i saw this. I can only find info to the contrary (M-21 close ratio). Did any '70 cars come w/ the M-22 or are they all M-21s?
The transmission's always been pretty noisy, but now i'm thinking its cause i need to add some fluid...eek! Aaron |
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#2
07-25-2006, 06:04 PM
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To the best of my knowledge M22 were only available in 71 & 72 .
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#3
07-25-2006, 06:38 PM
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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.
__________________
Dick Winkles 1970 RAIV GTO 4-speed 1974 Original owner Z-28 4-speed 2008 SRT10 Viper Very Orange (was SD TA!) 2015 Challenger Hellcat 6spd (was SD TA!) |
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#4
07-25-2006, 06:40 PM
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huh,
well what do you know...
Thanks guys |
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#5
07-25-2006, 09:22 PM
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70 455 4 speed m-21's also had a 2.27 first gear,compared to other m21's that had 2.20 first gear.
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#6
07-25-2006, 10:12 PM
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Wait a minute, scott70. Where did you get this info from??? Reverse had a 2.27:1 and first had a 2.20:1.
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#7
07-26-2006, 09:39 AM
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I swore i've read it somewhere(i knew reverse is 2.27)but now i think ive been wrong.Sorry for any confusion.
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#8
07-26-2006, 09:46 AM
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Quote:
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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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98 
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