Anyone have problems with the A/C belt being thrown on there 6.0L. I replaced the belts at about 80K. Showed micro cracks. Now at 100K it is throwing the A/C belt? Tensioner? A/C works fine when it is on. I could blame it on the 6500RPM it recently has been pulled to but it happened before this. What do other owners think? Happen to anyone else? It is 90 plus today.