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deuce_roadster · 05-27-2020, 08:30 AM

Not sure if this could cause your issue but a friend of mine (who owns a machine shop) bought a Speedway adapter for a GM 4 speed and because he is a machinist, he checks everything and the machining on the opening for the transmission was off by quite a bit and he had to adjust it. If you take it apart I would check all important measurements and angles, maybe the mounting surface isn't exactly 90 degrees to the CL of the trans.
However I would measure your disk thickness with a micrometer and compare it to a stock Ford disk. I believe the difference between engaged and disengaged is only something like .050 movement on the pressure plate and if the non Ford disk is just a few thousands thinner it could be the problem too. Good luck.

05-27-2020, 08:30 AM	#15
deuce_roadster Senior Member Join Date: Oct 2011 Location: Shelton, WA Posts: 3,800	Re: New Clutch Slipping Not sure if this could cause your issue but a friend of mine (who owns a machine shop) bought a Speedway adapter for a GM 4 speed and because he is a machinist, he checks everything and the machining on the opening for the transmission was off by quite a bit and he had to adjust it. If you take it apart I would check all important measurements and angles, maybe the mounting surface isn't exactly 90 degrees to the CL of the trans. However I would measure your disk thickness with a micrometer and compare it to a stock Ford disk. I believe the difference between engaged and disengaged is only something like .050 movement on the pressure plate and if the non Ford disk is just a few thousands thinner it could be the problem too. Good luck.