Ive started to notice a rattle/buzz noise sounds like its coming from the lower driverside of the car somewhere between the front and back door. It only seems to shriek in 5th gear between 60-65 mph when im cruising at the same speed at low rpms. Yet it wont do it above 3 grand or if I crack into it anytime from 1st-5th gear. Anyone have any similiar mysteries or any ideas?