My Ranger had been shifting hard for quite awhile. I recently opted to go ahead and replace the clutch, throwout bearing, had the flywheel turned and replaced the pressure plate.
This just seemed to make the problem slightly worse. I thought it was possible that my master cylinder needed to be replaced (the slave was replaced two years ago and didn't appear to be leaking when I had the tranny off). I replaced the master cylinder and now the clutch won't disengage at all. I've spent several days trying different things to bleed the clutch, and I just can't get it to bleed. I took it back off and bench bled it, then put it back on and bled through the whole system. This isn't working. I've tried numerous suggestions-jacking up the back end of the truck, jacking up the drivers side of the truck, I even bought a vaccuum bleeder and used it for 2 hours just having an assistant fill up the reservoir while I sucked fluid out the bleeder valve. The best I could ever get was some resistance on the pedal, but not enough to push the disc away from the flywheel.
I took the pickup to Ford, they said they bled it and charged me 90 bucks and still couldn't get the clutch to release

 

Thread moved to the proper forum.

Stewart

 

I know it seems like a strange question. But is your throw out arm bent? Another thing to check it's your firewall. This it's speaking from earlier f series trucks. But over time the firewall can crack and flex. I'd look into those two things.

 

Did you replace the pilot bearing?? I bought a '91 years ago and the guy I bought it from had just put a new clutch in it and it was still hard shifting. He thought the trans was going out so I got the truck pretty cheap. I brought it home and removed the trans. I found a brand new clutch just as he said. When I removed the clutch, I found that whoever put the trans back in after doing the clutch had smashed the pilot bearing. It was the needle style bearing and they are pretty fragile. I replaced the pilot bearing and put it all back together........still running 200,000 miles later!!!
Without a good pilot bearing, the input shaft will "****" slightly when the clutch is released and allow the clutch plate to slightly remain in contact with the pressure plate and flywheel. Therefore the clutch is still slightly engaged enough that the input shaft is still spinning the same speed as the flywheel, which makes it hard to shift. Hope that all makes sense LOL Good luck!!