Hey there guys and girls. I got my coupe about a week and a half ago, and have noticed that on the highway I get a rumble coming from the rear of the car. It is like a low pitched vibration/rumble that only occurs when you hold a steady speed or decelerate. If I give it some gas, the noise goes away. I tried to downshift into fifth to see if it was anything to do with the engine RPM, but no change. Has anyone run into this yet, and if so, what was the outcome? Thanks a lot in advance!