I've got a question. I have a 68 camaro with a 12 bolt posi rear end.I put 3.55 gears in it and the problem is when i get above 40 mph i get a loud whine from the rear of the car. It kind of sounds like a raised truck with 35 inch tires is behind you ( kind of give you an idea of the sound). IS this my gear,could it be that its not aligned or shimmed properly? Any ideas guy's? Thanks in advance.