Thread: Saginaw 3 speed
View Single Post
Old 07-06-2009, 03:39 AM   #2
Green Machine
Senior Member
 
Green Machine's Avatar
 
Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
Re: Saginaw 3 speed

GM started using the Saginaw 3 spd in 1968, earlier likely had a very weak non-synchro low trans.

The basic Pontiac trans should be the same as the trucks, however, the trucks started using a 5 1/8 front bearing retainer where it fits the bellhousing in 1968, while the cars stayed with the earlier 4 11/16 size hole, so you may need to swap the front bearing retainer, (with a new gasket and seal) to match the bellhousing hole.

Also, the truck trannys had threaded bolt holes for the bottom 2 bolts, cars just have holes, so you will need a bolt and nut inside the bellhousing to secure the bottom of the trans.

Unless GM did something with the trans length or output shaft spline count, it should work.
__________________
1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103
1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285
1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894
2001 GMC Sierra 1500 C3 6.0
Green Machine is offline   Reply With Quote