I have a 96 Tbird 4.6L. After replacing the alternator with an Oreillys new and not remanufactured unit and a new Oreillys AC compressor my car eats one rib off the serpentine belt. I was pretty sure it was the alternator pulley so I ordered the correct alternator pulley from Rockauto.com. It is still eating belts? I did do the AC compressor around the same time but it is the alternator that the belt tracks too far forward on. Anyone else have a simular issue? I am guessing it's the Oreillys alternator but I figure I would check here first.