Not driving style, it's a well known issue. In fact they kept trying to tell me that is the noise I am hearing from the front end when I go over bumps, "like when i go over a rumble strip". Apparently, I mentioned the word rumble strip and that caused customer service to tell the dealer it is my transmission since there's a TSB for the torque converter that references rumble strip like sounds.
Anywho....good luck. It's a great car and engine otherwise. You might get better feedback in the lfx forum