I don't really know how to explain this that well. Lets say that when my cars on the shocks at the highest point, when it starts coming down it feels like its grinding. The first time i felt it, it felt like the tires were hitting slightly hitting the top of the wheel well. I know its probably not that, but at this point i don't know what it is. Could it be maybe the exhaust piping is hitting the bottom of the car or something? So many people have told me different things and i have no way of telling what it could be.