Whine from rear. Rear end or driveshaft?

avalonandl said:

Drive shafts dont whine.

How many miles. Likely Pinion gear or bearings.[/QUOTE

145,000 Sounds more like rear end than bearings

Click to expand...

Jeffrey Howell said:

My 2008 GMC Yukon has a noticeable whine coming from the rear, under acceleration at highway speeds. I cant tell if it is a rear end problem or a driveshaft u-joint. Any suggestions on what to check?

Click to expand...

Doubeleive said:

generally the pinion bearing or wheel bearings will whine, the carrier in my experience will not whine but will make other heavier sounds, clunks, etc.
you might want to pull the rear wheels off and check to see if there is any axle grease coming out of the seals and look at the pinion, grab the pinion and see if it has any play in it.

Click to expand...

Fless said:

Differential fluid level, and condition if you can get some out.

Click to expand...

Jeffrey Howell said:

My 2008 GMC Yukon has a noticeable whine coming from the rear, under acceleration at highway speeds. I cant tell if it is a rear end problem or a driveshaft u-joint. Any suggestions on what to check?
Thanks!

By the way, it's not coming from my wife complaining about my driving.

Click to expand...