07 Vibration @ 27mph
 

07 Vibration starts around 26 to 30 mph when transmission changes gears in natural mode, not in PDK. Vibration goes away when reach 30 to 35.
Only does when car is warm and varies in timing.
Can happen after stopping at stop sign or after slowing down to turn, then accelerate.
Has been happening for approximately 10k miles and has not gotten any worse.

Anyone aware of potential cause?

I had a very similar issue. It was a bent rim.