The reason your belt is slipping is because your current primary clutch spring is too weak and not allowing the clutch to adequately back shift as your rpm's drop under load ( think hill climbing, or long steep grades, this causes the belt to slip, rapidly overheat and fail. This is common when you add more load (32's, heavy paddle tires etc.) to the stock configuration. A well balanced (designed) clutch kit is essential to extending belt life. You will however be forced to give up the nice low rpm engagement that is designed into the stock setup if you really want to solve the belt overheating issue. This compromise is necessary until someone comes up with a dual rate primary clutch spring and then we can have the best of both worlds. My current primary clutch spring is a 275lb spring, engages around 2400 rpms and i can run it hard for hours and typically see temps around 190 degrees. Highest I've see is about 210 which is in a very safe zone. Temps of 240 and above will degrade the belt rapidly. There are good setups available and there are better setups, depends on what you want to accomplish. I choose lower belt temps over lower engagement for aggresive desert and mountain running and then I swap the primary spring out for a 235lb when i do Moab ( 2100 rpm engagement0. Its a pain but its the only way i know of to make the belts last with my style of driving.