I picked mine up this AM with a new TC installed. No noise at all, nothing but tire noise and a hemi the way it was meant to be
I have about a 2 hour drive from the dealer to work and it was quiet, couldn't make it have a noise. Obviously I am a Happy Camper. I just hope it stays this way. Didn't tow with it or anything yet but as of now I am pleased.
This is the first one my dealer has done. It is a small rural dealership, they are great to work with, which is why I bought there in the first place. But they have not done any others besides mine.