I have the same noise. It is worst when cold here in Dallas. After driving the car for a while it gets better. Even is better if the car has been sitting in the hot sun all day. But definately worst when it is cold. Sounds like it is coming from the rear end. I would say diff area.
It happens on slow takeoff's like regular driving.
Problem is, once I get it down to the dealership, it has already warmed up enough where it is not noticable. Ahhh
Driving me mad
Please someone find out what it is.