Need new rear axle and differential 2500HD GMC***UPDATE***

[rtreptow7]

Have a 2017 GMC 2500 Denali HD Gas. Noticed some axle fluid on the rear inside passenger wheel. Thought I had a bad seal. Took it in for repair and they said "something let loose in there and you need a new rear axle and differential". Parts are ordered and they said they will have the truck for a few days to a week to fix. Truck has 10,500 miles on it. I'm guessing factory defect or something? Makes me feel uneasy about having major repair work done to the vehicle that I barely owned one year. Can I expect this to be "good as new" when it's done? I certainly will be watching it close, especially once the warranty gets close to expiring.

[Trackrig]

In your case, I don't think you want it "as good as new", I think you need it better that when it was new.........

Bill

[SidecarFlip]

American Axle to the rescue. It will be a drop in third member. Lash pre set. probably come with oil in it. It's a bolt up deal. Doubt you could upgrade to limited slip though (if you don't have it already). It's a tit for tat replacement.

[6_6_Oilburner]

This has been a rare but not uncommon occurrence with the 17s, I almost think there is an updated axle nut but I don't recall.

If they are replacing the whole assembly it probably ran long enough that it chewed up the bearing surface on the spindle some. If the dealer tech is competent, gear setup is 100% a non issue. If they are replacing the entire assembly....the lube tech should be able to do that without screwing it up.

[azrving]

If they are replacing the whole thing it's nothing to worry about. If they are messing with the gear set you have much more risk about the person knowing what they are doing. If they replace spiders or carrier bearings etc it's less work but how much metal has traveled through everything. Hopefully it's the whole drive axle housing assembly. Id bet that's what they are getting.

[BurbMan]

donn0128 wrote:
GM like all others buys the rear end assembly complete from an outside supplier. Any mechanical device can fail. Fix it and move on.

Well said. No need for paranoia, unless you really feel like you can't trust the truck anymore, in which case how much do you want for it?

[donn0128]

GM like all others buys the rear end assembly complete from an outside supplier. Any mechanical device can fail. Fix it and move on.

[NMDriver2]

If you do not have the limited slip differential already now is the time to get one put in.

[troubledwaters]

"Can I expect this to be good as new when it's done"
Presuming you took it into the dealer, the parts should be OEM, warranted for the original 60,000 miles, and good as new. The labor, well that's a coin toss.