Well Ive been throwing belts left and right for the longest time and this time when my belt shredded the front rib as it always does, I ran the car for a bit with the bad belt and noticed that the tensioner was bouncing like the tip of a fishing rod when your getting a nibble from a fish. I know the belt that is currently on it is shredded and could be causing this twitch, but do you think thats why Ive been shredding belts at high rpm? It's the origional tensioner with 100,000 miles. What do you guys think. Ive even had the pulleys aligned by amazon racing(One of the vendors on this site) and I'm still throwing belts.