Everytime i accelerate or press gas i hear this sound http://www.youtube.com/watch?v=NMu6IBLX5_U....it sounds like a blade hitting against something metal....if i take my feet off the gas then i hear nothing, sometimes it can get really loud.....the faster i go the sound of a 'blade hitting metal' also increases but bleeds away after driving at a good amount of speed.....seems to be coming from the right driver side.