Reply to john's Post: that makes sense....before this happened today, i had a spare tire donut on it for a couple of days and the metal grinding noise was constant while driving but seemed to subside after about 60 mph...it was making a "scrape-uh scrape-uh" noise. it did not, however, make that noise while turning right though. the noise was worse when turning to the left, and the grinding of the malfunctioning area felt like it was keeping my tire from spinning sorta like stopping the tire for brief moments and causing my car to jerk. any other input would be helpful. thanks.