Got a 63 GP with 375 hydromatic with some tranny problems.


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ben0020

Got a 63 GP with 375 hydromatic with some tranny problems.

Will not go into gear. I can't "feel" it go into PNDLR, tires won't spin..nothing. Shoud I pull the tranny and have it rebuilt or mess with the valve body? This is what I've done: pulled pan off....no metal shavings, added lucas oil transmission, refilled it, with no results. I have found and 64 Catilina with the same engine and tranny (I think) would I be able to use that trann? HELP!!!!!!

posted: February 13, 2009

Answers (2)

64elcie

Check out your linkage, and make sure that it is moving properly. As far as replacing the tran, If I remember correctly the 63 to 65 were still the same. Compare the dimensions, make sure the splines front and rear count are the same and bolt pattern are the same. What I am saying is: I don't think they changed trans between a GP and a Cat.
Good luck

posted: February 17, 2009

64elcie

A little more info: there were 72,959 GPs Built in 63, with 67,802 having Hydra-Matic, and 257,768 Cats built in 64 with 242,574 having Hydra-Matics, the Super Hydra-Matic cost $231 dollars extra and coded as 79 J or77J (depending on motor size)

sources: Std. Catalog of American Cars - 1946-1975

posted: February 17, 2009