[Joshinator99]

Originally Posted by Tannero

Hi everyone. I have a 2018 SS. Rear end had some rubbing noises and dealer flushed and changed fluid.

Improved some but now tire is wearing quick on right rear and squealing once in a while on right turns.

Took it in, they replaced one link they said was loose but no improvement. Any ideas?

Will take it back in but really want this fixed before I put new tires on again.

No grinding sounds? Just tight and needs constant fluid changes? Only has 20k miles on it.

If it’s a GM dealership you’d think they would have used the right fluid, but I trust them as far as I can throw them.

If that was your first time changing the diff fluid then that fluid was pretty cruddy I’d guess. I’d probably change that fluid again. They have to use a fluid with a friction modifier which the OEM fluid has. I’ve been using Red Line synthetic 75W-90 for years in mine for what it’s worth. But the differential should not be locking up like that.