four speed

raywaco · 04-28-2008, 04:55 PM

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 · 04-28-2008, 05:21 PM

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 · 04-28-2008, 05:53 PM

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 · 04-29-2008, 09:07 AM

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 · 04-29-2008, 10:37 AM

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 · 04-29-2008, 12:33 PM

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 · 04-29-2008, 04:55 PM

thanks alot you guys.

marcar1993 · 04-30-2008, 06:08 PM

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.

04-28-2008, 04:55 PM	#1 (permalink)
raywaco Junior Member Join Date: Apr 2008 Posts: 4	four speed 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

04-28-2008, 05:21 PM	#2 (permalink)
The_Jeremiah Senior Member Join Date: Jul 2007 Posts: 243	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. __________________ 69 Cutlass 4 door. Built 350 inside, grandma's grocery getter outside. Best sleeper in disguise.

04-28-2008, 05:53 PM	#3 (permalink)
Oldsmaniac Senior Member Join Date: Oct 2005 Location: NJ Posts: 371	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. __________________ OCA Member 2587 '59 98 conv. '66 Starfire '66 Delta Fact.4spd '66 Delta conv. times 2 '67 442 conv. '68 Cutlass conv. '70 Rallye 350 '92 Custom Cruiser

04-29-2008, 10:37 AM	#5 (permalink)
The_Jeremiah Senior Member Join Date: Jul 2007 Posts: 243	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 ? __________________ 69 Cutlass 4 door. Built 350 inside, grandma's grocery getter outside. Best sleeper in disguise.

04-29-2008, 04:55 PM	#7 (permalink)
raywaco Junior Member Join Date: Apr 2008 Posts: 4	four speed thanks alot you guys.

04-29-2008, 09:07 AM	#4 (permalink)
Run to Rund Senior Member Join Date: Mar 2008 Posts: 108	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.

04-29-2008, 12:33 PM	#6 (permalink)
Run to Rund Senior Member Join Date: Mar 2008 Posts: 108	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

04-30-2008, 06:08 PM	#8 (permalink)
marcar1993 Senior Member Join Date: Apr 2007 Posts: 127	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.

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