Belt quality
I am not so sure the NAPA belt was at fault but here is what I had happen. Hot day 90 degrees. Sitting in traffic but it finally opened up so I went for it on the shift from 3-4(stick) I heard a noise. :--) This was a bit frightening but calmed a bit after I shut off the AC. Got off the road. Popped the hood and the belt had gotten tossed off a few grooves and shedded up against the fan. This was a shock as I havent seen it happen in a long time. Again this could have been my fault, high rpm@3K, locked up fan clutch, high alt load, plus a power shift. In the end it made it home about 30 miles plus I got napa to warrantee the belt, it helps to be friendly.
Hadley