My complaint mimics the others on here. My car from the day I drove it home, has made a intermittent thump on deceleration. Just made my initial visit to the dealer today and they acknowledged there in a noise but have no idea which avenue to pursue. I did a google search and found this site. Hoping someone else has gone through this and found a solution.

Update from Sep 19, 2017: Yes, this noise is during downshift, while coming to a stop.