rear noise
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#2
Most noises from the rear are caused by brakes, struts, or sway bar. Since you said grinding I would pull your brake drum and see if you still have meat on the shoes. You will also want to check for missing or broken hardware. Don't forget to undo the parking brake and chock the tires or the drum may not come off. Look at struts for oil leaking and the sway bar bushings on my 2000 were hard as a rock when I replaced them.