Well ive noticed that when my car is in drive and im moving at around 1700 and 2000 rpms something rattles. Ive put it into nuetral and reved it up but no rattle only in drive. It sounds like its comin from the engine though. Only rattle for a second and i can only hear it when there is no music playin(somplete silence). My battery is loose but im not sure if that could be it. If u have any suggestions please reply. -bounce-