I Have my rig pulley swaped with a 5 or 6 on front and a slitghtly larger on the trans. Then i used one of the million belts i had laying around and it worked perfect. Then it started falling off and what not so i realigned all the pulleys and this came out to spacing the trans about a half inch to lower the pulley and doing that to the clutch pulleys as well. engine pulley is almost touching the frame. I took it out for a cruise and the belt slips like crazy. My dif is welded and in first gear it cannot break the tires lose in mud its slipping that bad. The belt is tight and has plenty of tension. Is it just a worn out belt?