Hi everyone just registered been looking at the forum for awhile. I have a problem and I do not want to take it to a dealership unless I have to. I have an 04 gto that I got back in January it has a little over 1700 miles on it. When I drive it for awhile I get black dust on the back end from rear wheel to reae wheel. I don't think it is brake dust because it is not on the wheels. Does any one know what is causing this?