I went out to my buddies lease the other day and road around with him for several hours. All of a sudden I heard a knocking/squealing noise coming from behind me. After that it felt like the belt was slipping and at some points in the ride back, almost as if it had popped off completely. I tried high gear and occasionally could get it to move (in desperation to try and get to the trailer to load up) but would Rev. but not move. I tried low and once I got started I couldn't stop for too long or else i got the same belt slipping feeling. Got to the trailer and to the house where i went to work on changing the belt, oil, etc. Imagining the belt would be melted all over my belt box, I removed the belt box and found a pretty solid belt, slight wear, but not 100x better than what it sounded like. I changed the belt and oil, cleaned up what I could of the primary clutch, and gave it a test drive after sealing the box and air filter again. Right off the bat the same problem presented itself. After searching the forums for 2 hours I could not find a situation such as as mine (or missed it) but tried to make all the checks that people suggested. I found that the secondary clutch seems to be sticking and jumping while in drive and trying run while the back end is lifted. Any ideas?