Whenever I drive over a bumpy road, I hear MANY LOUD RATTLES coming from the rear driver side of my car (I think it's in the vicinity of the wheel). At first I thought some bolts on the Addco RSB was loose but I checked it out and it's fine. The weird thing is if I drive over the same bumpy stretches of road while applying the brakes, the rattles disappear. Brake related? Opinions? Thanks!