Noisy Belt? Please help!
First of all I have a 2001 Jeep Grand Cherokee WJ with the 4.7. About a month ago my alternator went. I replaced the alternator, idler assembly (it had excessive motion at idle and a noisy bearing), and the serpentine belt. Days no slack tanner assembly and dayco belt. Everything seemed great at first, then a strange noise developed after 100 miles or so. The belt seemed to squeal, but only when decelerating. And it only appeared to do it from 1700 RPMs down to around 1000 RPMs. As soon as the engine is either above that or under that the noise stops. And I only notice it on deceleration, not acceleration. This noise is driving me crazy.
I read on here that Goodyear's Gatorbacks are the best belt, so I just replaced the Dayco belt with a Gatorback. The noise seemed better on initial test drive, but now is back and just as loud.
Any suggestions? Could I have gotten a bad tensioner? Any other possible explanations. I have never had a belt noise before and this one is strange that it is only affected at that slight range of RPMS. Not at start up. Not at any other motor speed.
Thanks in advanced for your help!