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Old 10-14-2003, 11:32 PM
Mike Pomerantz's Avatar
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Ford Top loader Transmission-HELP!

In my '77 Ford F-100 I installed a rebuilt 351W and behind it I had picked up a used Ford 4 speed Top loader Transmission, out of a 65 Fairlane. The origanal transmission for that truck was the old Borg Warner 4 speed, or as I like to call it the Granny Tranny (has an exceptionally low 1st gear). I'm using the same flywheel, clutch assembly, and bell housing from the original truck transmission. The bell housing bolt pattern is the same and the spline on the clutch disc is also the same. So is the throw out bearing sleeve diamter and pilot.

The Problem: I can't disingage the clutch from the flywheel, because of the input shaft and sleeve that the throw out bearing ride on, are almost 1/4" shorter than the original transmission.
Is it possible to swap input shafts from one Transmission to the other, or do I have to buy a clutch for a 65 Fairlane. If I do end up buying a different clutch will the flywheel and bell housing be different also?
Some things that have come to light; I measured the input shaft length from the face of the transmission to the end of the shaft and there is about an 1" difference in length (Top loader being shorter) It looks like I will be needing a shorter bell housing to accomidate the shorter input shaft. I now realize that I wasn't reaching the pilot bearing before, and that is creating my problem.
Does any one have any recommondations on vehicles to try for bell housings? Taking any options at this point.


Last edited by Mike Pomerantz; 10-24-2003 at 09:55 PM.
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Old 10-15-2003, 02:24 AM
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Thus I suspect the clutch disc is getting pined up against the flywheel by the throw out bearing sleeve, because the clutch disc is to thick where the springs are in the middle of the disc.
They would need to be 1/4" longer not shorter wouldn't they?

You can machine the throwout bearing support sleeve to any length you want on most transmissions I believe, it's the pilot shaft length that matters the most. If it's too short the splines and pilot bearing stub interfere and the stub won't reach the pilot bearing.
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Old 10-17-2003, 03:32 PM
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flipped disc?

Have you tried flipping the clutch disc? As I recall my Mustang clutch, the spring hub extends farther out from one face of the disc than the other. The hub could bind against the flywheel if the wrong side of the disc is facing the flywheel.
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Old 10-17-2003, 08:12 PM
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Did you put in a pilot bearing?
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Old 10-20-2003, 06:17 PM
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You didn't give any dimensions for the two tarns input shafts, but i suspect you need a small block trans for a three speed or four speed (Ford top loader style). The input shaft on the small block trans was shorter than the big block and I would imagine that the granny gear 4 speed is the dimensions of the big block trans.
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