my 1961 c10 with 3 speed manual trans is not wanting to fully disengage the clutch. i have replaced the clutch dish, pressure plate, throughout bearing and slave cylinder. i have also adjusted the pedal and the slave cylinder about 100 times and it still wont release. i have checked and added fluid to the gearbox to make sure that was not the problem. the only thing i didn't replace was the pilot bearing which didn't look to bad. i have made sure there is no air in the line and the fork looks like it is moving as much as it can. i am needing some help cause i have tried everything i can think of. if anyone has any ideas i could really use some please
But that vehicle is so old. I would take the gas to that. The parts aren't correct and don't fit perfectly. If you've loosened the adjustment on the clutch as much as you could and it still won't fully disengage, that would mean that the clutch is jammed because it's not the right size. I've had that happen in the past and it really pissed me off that I took a transmission off, did a clutch job and then when I put it in it did exactly that because the parts were not correctly made
Make sure the clutch disc was not accidentally installed backwards. I did that once ages ago and had the same kind of symptoms.
You mentioned the pilot bearing looked good, but if there is a problem with it you'll experience exactly what you're describing. The clutch will appear like it's not fully disengaging because the flywheel might be turning the input shaft on the transmission due to the pilot bearing being seized.
The pilot bearing can also become damaged when reinstalling the transmission if the input shaft isn't lined up with the pilot bearing hole. Hitting the pilot bearing with the input shaft can damage the bearing.
I don't know if this is what's causing the clutch to not fully disengage, but it's worth keeping in the back of your mind.
South Main Auto has a great 3 part series on replacing the clutch on a Mustang. Here's the part where he talks about how a bad pilot bearing can prevent the clutch from disengaging.
https://youtu.be/Gna4dSHfFHQ?t=246
