Urgent clutch problem!!!!!!

94 wrangler 2.5L 5 speed. I was driving today, and drove a fair amount. Probably around 70 miles today. All day, it was fine. I was driving home, in the rain, on a road that is pretty constant, two lane, 45 MPH speed limit. It was fine one minute, the next the clutch would simply go to the floor and not disengage the gears. I could, and did, put the clutch to the floor, step on the gas, and the jeep would go as if the clutch were completely depressed. I did this three times, one time it was on the verge of disengaging the gears, but didn't, it would have needed another inch or so of depression, which it didn't have. I managed to get home just by matching revs to shift, and never quite stopping.  Got home, turned off the jeep, went through the gears without clutch, went through gears WITH clutch, with at this point with the vehicle off had returned to normal, turned the vehicle on, and it worked perfectly. Reversed, drove forward, shifted into any gear- So why, within 30 seconds, did it STOP working, and then again decide to work? When it wasn't working I tried pumping the clutch often, to no avail. I have a slow master cylinder leak, and I assumed that maybe a line had burst and the fluid was gone...but why then would it work? It's pouring rain out or I would check the resevoir. Please help! Thanks in advance.  

sounds like the cup/seal in the slave cylinder is leaking, allowing an air bubble to form. and unlike hydralic fluid, air is able to compress. so the pressures required to build in order for the clutch to activate are non existant. and the reason the clutch works for a moment after the jeep has sat, is the air bubble has worked its way up to the master cylinder and into the resivor. then with a few pumps of the pedal a new bubble will form in the slave. the slave cylinder is fairly easy to replace yourself, but if it's something your not to comfortable tackling yourself, a good transmission shop can have you up and running agin  

The clutch master cyclinder mounted on your fire wall is leaking.  Two bolts on the firewall and disconnect from clutch pedal and one line to disconnect is all it takes to remove.  It is located next to your brake booster, it will be a small cup with a screw on cap about 2 inches in diamter.  When you put the new one on you will have to bleed the system, takes two people.  One person will push the clutch pedal to the floor and hold it while the other person will lossen the bleeder screw that is located next to the transmission on the fluid line going into the bellhouseing.  The repair is simple and should only take about 30 mins.  Happened on my 92 YJ while I was sitting in traffic, had to kick the shifter in first to get it out of the road.  

could be the master or the slave..... i just replace the whole unit (both at the same time) if one is old enough to go bad the other is on it's way....