Look for cracks on the serp. belt, The goodyear gatorbacks have small indentations that run at an angle to the grooves making it more flexible than the oem belt. It aso seems to be made of a softer compound. Look into a DMD and change the belt during the DMD install.

1999 Toreador Red SVT, DOB 4/22/99, 2005 Of 2760. "Many posted questions are answered by farm boys"