[RollaMo]

Thanks to this forum, I was well aware of these issues when our 2017 2SS A8 started to show the same symptoms.

Took it into the dealer, and to my surprise they knew what I was talking about.
I had printed both of the documents that are floating around (Trans shudder & Rear End Groan) and showed them.

I'll tell you what the customer attitude going in can make a big difference in how you are treated.
When I showed them the documents, I mentioned that I wasn't trying to diagnose the problem and I was just trying to give them a starting point.

Anyway, they performed the rear end flush, and the 3 flush on the transmission.
Picking the car up late this afternoon, so we'll see how it goes.

He wants us to drive the car for a good 200 to 300 miles and if the shudder is still there, GM will replace the torque converter.