My 2003 F-150 4x4 76k miles, I hear a light singing sound or almost like a wind noise or a sizzling sound, but it is coming from drive train. It don't really sound like rear end noise. It's not real noticable, but to me I hear everything and I know it's not normal... Anybody have any suggestions on what it might be ? U joint ? I thought maybe brakes but they look new. I just bought this truck last week. Any thoughts would be appreciated ! I'm planning on changing all my fluids and diffs over to Amsoil next week..

Thanks, Rodney

 

Bump