[Rambo305kid]

Ok so I’ve researched and put in a lot of wrench time to figuring this out. It’s driving me crazy!! Please help me.

When I drive at 4K rpm I get a grinding noise or squealing. Listen to the video. I replaced every pulley on the car with nst pulleys, thinking my pulleys were beat and it needed to be replaced. Mind you I’m at at 94k miles. I’ve also replaced the belt to also eliminate that. Still had same issue. Figured ok
Well maybe the bearings inside the alternator is going bad as well. Bought a remanufactured alternator and the car is still giving me this issue. What could I be missing? It’s only when I drive a live 4K and keep it there will
You here this noise.