Rear diff / eLSD fluid issues AWD 5V / diff replacement?

[d_finney]

Anyone had this happen yet.....
Had all 3 diff fluids changed at dealer - per manual since it was tracked. Replaced with BG fluid.
Car starts shuttering / rear diff not acting correct almost right away- goes back to dealer
Dealer says TSB on BG fluid with eLSD - switch back to GM fluid. They are flushing diff 2x and then returning the car to me.
Told issue should be gone within 500 miles, if not then rear diff replacement.

Car is under warranty, so no cost to me, just wondering if anyone has heard of this or changed rear diff fluid and had a problem.....

 

[rubberduck]

Seems insane they would try a non-recommended fluid as an experiment on you.

 

[d_finney]

BG fluid is generally what is used by the dealers.....have used it in previous car's transmissions too and it did a great job of lowering the trans temp.

Since mine is AWD, it is the fluid used for the front diff and the transfer case, as I did ask the dealer should all of those be replaced also......

Good warning for anyone with an eLSD that tracks the car....ensure when they change the fluid they dont do this.....
I almost did the work myself and so happy I didn't