my acc. belt is squeeking(sp?). not all the time jus when it hits about 2500rpm. and only when in drive or reverse. assuming that means it slips under load. i have replaced the belt and it still squeeks. there is no abnormal signs of wear on either belt and i believe the tensioner is tight and is still good considering it was a bit** to get off. i also have tried belt dressing and didnt seem to work. anyone have this problem b4? any suggestions?