clutch issues

[fire fly]

I'm having clutch issues. Heres whats going on...my clutch is slipping, but only once the car warms up. When its cool it grabs a little high on the pedal but it still grabs hard enough to drive normally. Once it gets warmed up though the clutch slips if I get on it too hard, or if I'm going up an incline. It gets to the point where its so delayed that I'll let the pedal all the way out and theres a good amount of time before it actually grabs. Now the frustrating part is I've already replaced the master, the slave, and I put in a whole new clutch set. I also had the rear main seal replaced thinking my disc was getting contaminated by oil. After all this it's still doing basically the same thing, its definetly improved after all the parts I've replaced, but it still slips. It seems like it has to be a hydraulic problem maybe but I'm really not sure at this point. Are our master cylinders self adjusting? Maybe thats the issue. I'm stumped so all you transmission gurus out there, work your magic!

[rotorimp]

Your fork and pivot are not worn? Did you bleed the hydraulics well?

[fire fly]

the hydraulics were bled well, I hadn't considered the fork though. I just don't understand why heat effects it so much..