Mine is the same way, I just bought the jeep @ 64000 miles and had the squeak when it warms up. I had slight clutch chatter so I decided to change the clutch. I found my flywheel and pressure plate both blue with heat cracks. The internal springs in the disc were ready to fall out. I replaced the flywheel, presure plate, disc, throw out brg and pilot brg. I lubed everything with high temp grease. Guess what the squeak is still there. I am at a loss, there is no metal to metal surface in there that I did not lube. maybe it's my slave cylinder. I will follow this thread, I hope someone else has more to add to this than I do.