Reason I ask is that in my case, I sometimes get a very loud 'bang' sound in the rear over certain bump/imperfections in the road that IMO are not even that big. From my inspection of the rear the only explanation I have is that the bottom of the rear chassis that mounts to the bottom of the fascia behind the wheel (1 bolt) is rusted off and therefore the fascia can flap and hit the chassis under chassis twist and create the banging sound....or a couple panels in the rear are banging under chassis twist....extremely annoyed by this.