"Whining" noise from differential or axels

[MrSunshine]

So, I've searched through ALL 78 pages of the forum & couldn't find (or missed) anything related to my issue.
I have an 06 base that at around 82k miles, I noticed a very faint whining sound coming from "somewhere". After a few days, I noticed it getting louder. Now, it very apparent that it only happens under power, (let of the throttle & it immediately stops) gets louder & higher pitched with speed, (starting at around 30 mph) & DOESN'T change pitch or volume with gears shifts (so, not the trans) It sound a lot like the whine of a super charger.
My diff had developed the very common clicking / clunking issue, & that was resolved with the fluid change & friction additive, but the whining persists.
It's been suggested that it might be that the pinion gear needs to be "reset", that diff has simply gone bad & needs a VERY expensive rebuild, or that it might be a wheel bearing or axel issue.
Has anyone else experienced this issue? And it so, what was the solution. I just don't want to end up doing a complete rebuild, if it isn't truly necessary.

 

[robert.ogden2009]

Sorry to hear about your noise problem. Can't you have it on a rack and use a stethoscope to narrow down the area. A wheel bearing is a lot less expensive than a ring & pinion. Hope you get this solved with a minimum of expense.

 

[mickeytee]

you dont even want to think about a rebuild on the diff .I doubt anyone within100 miles of you has all the proper tools and skills to do it . you can buy a good low mileage one for a couple hundred dollars and just swap it out. They dont have a history of going bad so there are plenty of them out there that would love to find a new home .

 

[Michael B]

So, I've searched through ALL 78 pages of the forum & couldn't find (or missed) anything related to my issue.
I have an 06 base that at around 82k miles, I noticed a very faint whining sound coming from "somewhere". After a few days, I noticed it getting louder. Now, it very apparent that it only happens under power, (let of the throttle & it immediately stops) gets louder & higher pitched with speed, (starting at around 30 mph) & DOESN'T change pitch or volume with gears shifts (so, not the trans) It sound a lot like the whine of a super charger.
My diff had developed the very common clicking / clunking issue, & that was resolved with the fluid change & friction additive, but the whining persists.
It's been suggested that it might be that the pinion gear needs to be "reset", that diff has simply gone bad & needs a VERY expensive rebuild, or that it might be a wheel bearing or axel issue.
Has anyone else experienced this issue? And it so, what was the solution. I just don't want to end up doing a complete rebuild, if it isn't truly necessary.

I have 06 as well. Same thing . I couldn't really locate until it started pour coolant out. Water pump went bad . That's probably one of the easiest things to do on this beast. Still Took me a bout an hour to complete.

 

[James Landi]

Have you checked the serpentine belt? My mystery noise/annoyance was finally tracked down to a noisy belt. The noise tended to respond to acceleration, so I, too ,logically concluded that it was in the drive train. I good mechanic located the problem, as the belt was noiseless when the car idled. He sprayed belt "dressing" on it, and we went for a drive... noise disappeared for a short time. It's not an easy "fix" to replace the belt, so my suggestion is based on making certain that you've isolated the issue. Hope this helps, James