Hey guys so i have a 04 gto and my diff started making a noise. It sounds like something is thumping and rolling around in my trunk. Does anyone have any ideas or suggestions because this noise is driving me crazy. I have researched and researched i have heard driveshaft but i took it out and rolled the car no more then maybe 4mph and still does it. So its clear its something in the rear end. Any information or possible solutions would help. Thanks everyone!