I've got a squeaking problem and I can't figure this one out. I've replaced alternator, tensioner, idler pulley, water pump, belt, a/c compressor bearing basically everything but the harmonic balancer. It sounds like the squealing is still coming from the a/c compressor region. The squealing comes and goes at low rpms and completely gone at high rpms (70 mph). Sometimes at idle it stays there for 5 minutes or so but even with screwdriver trick I can't find it. Any help would be greatly appreciated. I'm at a total loss on this deal. 2004 F250 95K stock w/5" lift is all.