I got a noise coming from the center of the car at 2000 rpm's. It dosent matter what gear it's in, it just happens at 2k. The center mount and flex discs were replaced recently. Could it just be the drive shave is slightly out of line? Is there a certain angle it should be at? Or maybe I'm just thinking all wrong on this? I know it's not my exhaust. It sounds like a rattle. Any ideas?