MikeD
Full Access Member
Yikes! Scary! 2012 here with ~2,500 miles. Nothing like what you are describing, though now I'm paranoid. You can feel and slightly hear the D or R gear changes, but nothing beyond what I'd expect from an automatic. No clicking or thumping.
It wasn't a huge deal I just heard it with the window down and hate having strange noises. There were absolutely no drivability issues other than a click and a couple of clicks backing up, almost like something adjusting.