Originally Posted by HotRodGuy
what exactly causes the whine, is there damage inside the rear end or is it really just a normal thing?
Here is my best guess..... the root cause is improper gear tooth contact due to an assembly process control problem setting the proper pinion to ring gear engagement and backlash. These settings are critical to obtain quiet gear mesh
2005 GTO, M6, Quicksilver / Black
2003 GTP, Silver / Black, 3.4" Pulley
1994 Z-28, Red, M6, Hotcam, SLPs, Tune
1994 Z-28, Red, M6, stock
1994 Cadillac STS