Okay, I have read the posts on the differential whine, however, mine whines between 15-2500 rpm in any gear. This indicates transmission vice differential since at 2000rpm in 3rd or 4th, the speed (differential rpm) is much different than in 5th. Another indicator it is the tranny is it goes away when the clutch is depressed. Does anyone else have this noise? I am taking it to the dealer today, so should get a better answer soon.