Got mine fixed. Boy is it quiet now! I have "stealth mode" back.
I think mine got noisier slowly over time, and I didn't notice till the noise was obscene. Shop manual says 1.3 hours of labor required.
Dropped mine off at 2pm and it was ready at 3:30pm.
I just sat in the dealer and read.
The service agent at the desk wanted to give me a ride home.
He seemed surprised when I said I would just sit and wait.
He says "well this could take several hours, are you sure you don't want a ride home?" I said nawwww I doubt it will take more than an hour and a half.
Boy was he surprised when I shook his hand and took the keys from him at 3:30. And that was after the free car wash.

-John