Ok so i was driving last night on a mustang cruise and i noticed a wierd rattling kind of sound when i was on the free way. I havent ever heard it before and it sounds like a thin piece of metal rattling on another piece of metal reason i say a thin piece is cause its not a like clunk or something cibrating but something thin just like smaking something else. It really isnt htat loud but i hate rattle and stuff like that so i want it gone. It sounds like its coming from the front right side of my car. And it seems to do it more when im going faster. I looked a little bit just now i just felt around a little and noticed that the the shield thing (not sure what is called) that sits behind the brake rotor flaps against my brake rotor really easily so i was thinking that might be it if anyone have any ideas if thats would be it or something else?