2011 Silverado rear end noise?

Truck started making a noise maybe 6k miles ago or so just guessing. Is it possible that if I have someone properly set the pinion seal nut now that it would prevent further damage?
If you have driven many miles since the seal was changed, a new wear pattern could have developed on the pinion and ring gear. In that case, the noise may not totally go away but may improve. If you have a small pointer type torque wrench capable of reading about 7-14 inch pounds which is a typical spec without a new pinion bearing , you can check it yourself. You will need to disconnect the drive shaft and remove the calipers (or drums) so that they don't affect your preload reading. If you applied too much torque to the nut where the preload is too high , The differential will need some disassembly to install a new crush sleeve prior to setting the preload.
 
If it needs new bearings, probably about $600-$800.

Better than a used unknown axle, and swapping your brakes and all that over, plus the labor.
 
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If it needs new bearings, probably about $600-$800.

Better than a used unknown axle, and swapping your brakes and all that over, plus the labor.
I'm amazed at the lengths people will go to avoid r&p setup, including buying a used axle which is -- as you said -- unknown. Brakes could be a basket case, wheel bearings are a wild card, even TAD may be different. Sometimes u-joints don't match so you need to get a crossover joint.

Then everyone thinks they can reuse u-bolts, which you most definitely should not, and you've gotta bleed the brakes.

NONE of this is difficult, but when totalled up it's no less expensive or easier than just addressing the r&p head-on.
 
I've had three bad experience's with Toyota and GM diffs- more damage = more money. Just take to somebody who knows what they are doing and forget about it.
 
FWIW the old Haynes manuals would tell you to mark the nut and turn it 1/8" past the mark when tightening it after you install the new seal. I had a 1974 C-10 where the nut came loose and I just retightened it and blue Loctited the threads and never had another issue, including noise, from it.
 
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