I just changed the alternator and now I have a squealing coming from my alternator when i rev the jeep in neutral. It doesnt happen on startup and it doesnt happen when i accelerate in gear. but when im in neutral and i rev the engine, the alternator squeals. Its not the belt, i even put belt dressing and it didnt do anything at all. Did i get an alternator with bad bearings or is there anything else i could do to get rid of the squealing? Thanks to anyone that can help!