It's more of a metal on metal sound. I pulled all the wheels and checked it all out. The front seems to be fine, but the back is a different story. Where the spring and damper base meet, I see fresh metal ware marks, like the spring is getting loose, and slapping it. All the parts are in place, I don't get it. The car drives fine. I only get this on medium bumps and large ones. Sometimes on the interstate it will happen where new pavement meets old.