2000 Subrbn - rear end whine?

[Jimzu]

2000 Burban with 145K miles and I get what I assume is rear end whine between 45 and 55 mph. I had a 1996 and experienced the same thing.

(Q) Is that typical this vehicle and/or Suburbans in general?

(Q) Is it really the rear end? Or what?

(Q) Is it anything to worry about?
Never had a problem with it in the '96.

[tm4hammer1]

pull the housing drain the oil check the bearings if good or farly good replace gasket and fill the diff. back up with 75W90 mobile one synthetic oil, the additive gl-5 should be in it that migt solve you whinning LOL