Thanks for the great forum - I'm glad I found it.
I'm having what seems to be a heat-related problem with my 1998 Acura Integra.
After driving for a while, it gets progressively harder to change gears. It is like the clutch isn't disengaging completely. Moving the shift lever is difficult and I get some grinding when/if I can shift.
When the car is cool, everything works fine - the shift lever is easy to move.
The car has a hydraulically actuated clutch. There is plenty of fluid in the reservoir. The clutch pedal isn't mushy whether the car is hot or cold - it feels 'normal' even when the problem is happening.
Any ideas what might cause this?
When its hard to shift, how far from the floor does the clutch have to come up before it engages?
Did the problem begin to occur when trying to engage reverse gear and then develop to be a problem in all forward gears too?
Did you get any further with solving this problem. I have almost exactly the same on a 1990 1.8l VW Passat. Except its an intermittent fault that isnt heat related -- can happen if car is hot or cold.