My car hasnt done this atall up untill i got into my car after work, so its been sat for 9 hours and as i was driving the steering felt a little bit weird, i just put it down to the weather being really cold but as i went over speedbumps and the shocks compressed all was fine but as they rebound back there is a grating noise coming from the drivers front corner. Its nothing scraping the bumps its as if there is sand in my damper or something like that, the more speedbumps i did it started going away, any ideas? thanks