numbers.....

[Anders]

Hi

Can anyone tell me what kind of gearbox I have on my Corvette.......

The numbers are 3851325 and 3857584 GM.

Also where can I find a Hurts shifter for this transmission ? Does anyone know a dealer who have one.....

Sincerely

Anders

[Bill Clupper]

Re: numbers.....

The '325 designation on the case means it is either a '64 or '65 case. look at the input where it goes into the clutch. A Close ratio (2.20 low) will have a circumferental ring cut in the splined area. A wide ratio trans (2.56 low) has no groove in the splined area.

[Floyd Adams]

Re: numbers.....

The numbers you have posted are the Main Casting number (3851325) and the Extension Housing Casing number (3857584) and are for the Muncie 4-Speed on the 1965 model. I can't tell you if it is wide ratio or close ratio from these numbers. I have read that none or only a very few M22 were used in 1965.