I have a 94 ranger 4.0l 6 4x4 manual. Just recently I replaced my clutch. It would work for about 15 minutes then oce it was hot it's would not shift into 1st gear. I replaced the clutch petal and did not have any problems for a month but now it is back to doing the same thing...any ideas?!

 

I'm not familiar with a 94, but if the clutch master cylinder is mounted where you can pour some cold water on it try it and see what happens.

I've read that the piston seals can become heat sensitive and not move the fluid.

 

Should I rebleed the system does that seem like it could be the prob??

 

Hey so I spraid the master cylinder with water and it started to shift again but it was still a little rough...is the master cylinder going bad??

 

I had problems with my '91 Ranger when going over the mountain passes in the summer. If the grade was steep enough that I had to downshift to 4th gear, then usually the engine would run a little bit hotter at the top of the grade. When I tried to shift into 5th, I couldn't. I'd have to drive for a little while until the engine cooled before I could shift.

I never really figured out what the cause was. I attributed it to the brake fluid in the clutch system absorbing water and lowering the boiling point to where I wasn't compressing fluid when I pushed on the clutch pedal, I was compressing gas because the water in the fluid had boiled. I was going to flush the clutch to remove all the old fluid, but I "fixed" the problem by replacing the single-row radiator with a 2-row radiator from an automatic. That kept the engine cooler so that the cooling system temp was still regulated by the thermostat. My intent was to keep the engine cooler, the clutch fix was an unintended and completely unexpected benefit. Prior to the radiator replacement, I had "fixed" the shifting issue by putting the heater on high when going over the passes, but that doesn't make for comfortable driving conditions. Now that I look back, maybe I should have expected it.

I'm not saying to go change your radiator, but you might consider flushing the clutch fluid. Just be careful. The clutch is notoriously hard to bleed if you get air in it.

 

Looks like you need a new master, but like Mikeman said if you try to bleed it again, keep the air out of it.