I've had this clattering noise since I got my LC, exterior, near the rear wheels, when going over rough roads, pavement cracks and similar. Sounds like something loose, but I've gone underneath many times and all seems tight and secure. I tried pulling up the hand brake a little and seemed to quiet it down when going over the rough spots in the road. Is it possible that the internals of the e-brake (inside the rotor hat) are so loose they would do that? Suggestions as to how to address that?