raywaco

i have got a 1970 442 455 automatic.i would like to change it over to a 4 speed .i found a 1975 trans am with a 400 4 speed .would the parts interchange.such as bell housing and pedals perhaps .also would a 75 trans am most likely have a saginaw? thanks alot

The_Jeremiah

I heard that it wont, its only up to like 71. but im NOT sure. LOL i hope someone gets a chance to comment on this thread, because i can buy a saginaw from a chevelle for my 69 cutlass, and i was wondering if it would bolt up.

Oldsmaniac

I doubt the pedals would work or linkage/z bar, as its a different body than the A body you have...the bell housing should work as BOP all had the same bolt pattern...I dont know what trans it would have but the trans should work...you will have driveshaft issues and yoke mismatch, shifter handle may be wrong angle, your 455 crank needs work or bushing for pilot bearing and may need to be drilled deeper. You will need a Olds flywheel.....the converson is do-able but not with most of the TA parts.

Run to Rund

the tranny may be a super T10. The Saginaw is pretty weak. Both bolt up. As noted above, shifter, input and output splines need to be sorted out.

The_Jeremiah

my friend said it was a saginaw out of a chevelle, i said it was probably a super T10, neither of us are sure. Its a hell of a deal. Whats the input and output spline count on a 69 oldsmobile ?

Run to Rund

1.125 x 10 input, 27 spline (powerglide size) output, iirc.
"Best" would be the later 1.125" x 26 spline input, 32 spline (T-400 size) output

raywaco

thanks alot you guys.

marcar1993

in a t/a it'll either be a t10 or a BW wide ratio. Everything but the linkage (pedals ect...) bolts up. You may need a different crossmember.