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Author Topic:   Tranny question

Posts: 155
From: Phenix City, AL
Registered: Feb 2002

posted 04-19-2002 12:13 PM     Click Here to See the Profile for RPM289   Click Here to Email RPM289     Edit/Delete Message   Reply w/Quote
Is it possible to change a small C4, 26 spline trans. over to a 28 spline and the big bellhousing. I have a rebuilt 66' C4 with a stock converter and small bellhousing. And I have a 3500 TCI converter (28 spline) for a later C4 with the big bellhousing.


66' Mustang
95' Lightning
65' Mustang

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Just Strokin

Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 04-19-2002 01:05 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
First off, the spline is 26/24 on 70 or 71 and later and 24/24 on pre-70's, as I understand it. There was one year that used 26/26 input shaft. It would possibly require changing some internal parts in the transmission to accept the shaft or it might not. Try and see if the 26 sline shaft will work. You will also have to change to the larger diameter flexplate (flywheel as some like to call it).

Second question, yes, you can exchange the bellhousing provided...1) the cases are the same....or 2) the large bellhousing bolts to the pump not the case.

If the larger bellhousing bolts to the case and the transmission you are wanting to use has a bellhousing bolted to the pump, you have to search for another bellhousing like mentioned in #2 above.

My .02, find a later model C4 with bell and have it rebuilt instead of mixing and matching.

[This message has been edited by Just Strokin (edited 04-19-2002).]

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