I was leaving on a 2week vacation and at the start of the trip my clutch got hard to push. There was a strong vibration and it wouldn't release. When I stoped it couldn't go in gear with out shutting the truck off and then it wanted to take off. I called a local dealership and took it in but on the way there it "fixed" its self and they couldn't find a problem, clutch fluid was fine . It was a long trip down south (6000km) and it worked fine ever since.I took the smarty out before going to the dealer and ran the trip towing my 9000lb 5'er on the stock power. Any ideas on what might of happened? Did i break a spring in the clutch disk, or dual mass fly wheel. Or maybe a hydraulic problem with the slave cylinder. I was running sw5 on the smarty, maybe too much for stock clutch and 9000lbs? Has this happened to anybody else?