I need some help. I was driving and every dip in the road that I ran over I heard a scraping noise coming from the left rear. It sounded like the tire scraping the wheel well. It's really bad when I have passengers in the rear. Does this sound like I need new shocks/struts or what???? And If so will this cost me alot of money. P.S. I have some chrome 17" rims and 235/17/45 tires.