My wife and I just bought our sixth Jeep. We bought a 2007 Jeep KJ sport with the 6spd manual. We live close to the beach and have enjoyed driving our Jeeps on the beach. Exactly one week after we purchased our Jeep we drove onto the beach and experienced a problem with our clutch after shifting from 4wd lo to 4wd high. We slowed down to a walk (1-3mph), put the transmission in neutral, and operated the transfer case. The pedal became very stiff and would not disengage the clutch. Driving without a working clutch was not fun. I could manage stop lights and signs by shifting the Jeep into neutral and turning the ignition off and waiting a couple of seconds. This allowed me the use of the clutch for about 10-20 seconds. By the time I drove to the dealership the clutch was functioning fine. They test drove it for a couple of days on the road with no malfunctions, and gave it back to us. We drove on the beach this weekend and had the same clutch failure. I am thinking that it could be a broken transmission mount or engine mount that misaligns the drive train when driven off road. I think that turning it off relieves some stress on the drive train and lets me shift a couple of times before it falls out of alignment again. Or could it be a broken master cylinder? I know that the current Wranglers were having master cylinder issues, and Liberties have a similar drive train to the Wranglers. I don't think it was my driving I have had six Jeeps, two of which with manual transmissions and NV 231 transfer cases like this Liberty. Any insight or help would be appreciated.