Today I was bouncing down a rough trail and went to shift gears and my clutch didn't disengage all the way making the gear shift difficult. A minute later after stopping and shifting to neutral I couldn't get it back into gear. The clutch pedal was going nearly to the floor before there was any resistance. After pumping it a number of times the resisitance came back and for the rest of the day the clutch worked normally.
The master cylinder fluid level was OK. The system was bled last year. The fluid might have some dark material in it but mostly clear.
Ideas? I sure don't want to end up stuck in neutral out in the boonies.
89 YJ Sahara, 5 speed, 4.2, nuttered, Motorcraft carb conversion, mild lift, 33s.