Tightened my belts a while back after my gasket job, also put a new alternator in. I'm using gatorbacks and the belt in question is the one on the alternator. Whatever the other pulley is on that belt, it looks dented a tad. Also, the belt is a 4-rib pattern. The rib closest to the motor, on the belt, is totally shredded off. Anyone got any ideas? It's frayed and squealing.