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- - 4 speed Transmission interchange? (https://67-72chevytrucks.com/vboard/showthread.php?t=847900)

Bunky

10-07-2023 02:16 PM

4 speed Transmission interchange?

I have a Creeper gear transmission in my 67 C15 . I would like to swap that out with a Saginaw 4 speed. Can I just swap these out and keep the bellhousing,clutch assembly intact. Or is the splines different on the Saginaw?

cadillac_al

10-08-2023 08:17 AM

Re: 4 speed Transmission interchange?

I am 98% sure the splines are the same.

geezer#99

10-08-2023 08:38 AM

Re: 4 speed Transmission interchange?

Spline should be the same but the trans input bearing housing diameter might be different.
Info in here.

https://www.streetmusclemag.com/tech...t-bellhousing/

kwmech

10-08-2023 05:29 PM

Re: 4 speed Transmission interchange?

Nose cone should be the same being an SM420. I would however check the bolt pattern

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