You may need a 4-wheel brake inspection, at times when your brake pads are low the metal indicator begins to scrape on the rotor. Double check and make sure that brush guard is sucure on the underside, this can become loose and cause a scrapping sound as well. I recommend that you begin with a brake inspection.
〉 Answered on Jan 24th, 2013 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions