Well, I have a 2003 Tahoe 5.3 4x4 ect ect with 251k on the original drivetrain
Anyway! when accelerating (20mph and up) There is a whirring type noise coming from the rear on the truck, gets loud when cruising 60+ but goes away if you let off the gas.
Had it on the lift at work and had the shop forman stick his head under there with a stethoscope and.... rear end completely quiet?!?!?
I just did u joints and yes the noise was there before and it did not change, also changed the rear diff fluid 75-90 syn and transfer case fluid to no avail. any ideas?!?!?!?1
