Trans Input Shaft ID

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**Hotrodpaul** · #1 07-22-2007, 07:33 PM

I am trying to identify P/N 3831766 GP 4.351 and would like to know what the input shaft fits. Any help would be appreciated.

Thanks, Paul

**Mr70** · #2 07-26-2007, 05:43 PM

Paul..that's a Main drive clutch gear input shaft.
Yours is the first design and has 24 teeth.
It was used on the 1965-67 Big Passenger series cars & 1967 Corvettes w/M-21 4 speed Muncie w/2:56-1 1st gear.
It was soon superseded by part #3924781.

**Hotrodpaul** · #3 07-26-2007, 07:54 PM

Rick, thanks for the info. I thought the M-21 used a 2.20:1 First Gear? Unfortunately, the number listed was in an Ebay auction and has already ended.

Thanks, Paul

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