I searched the archives and posted this on the "other" C5 site but figured I'd get some Z specific answers here. This afternoon I was backing down the driveway and pulled up on the E-Brake in an attempt to adjust it a bit and it grabbed fine. I released it and after cruising for a while, lowered the windows and now I hear a scrape-scrape-scrape that sounds to be coming from both sides of the rear on every wheel revolution. Any ideas? Car is an '03 Z06. Thanks in advance.