[Phattlard]

I had this same exact problem you are describing. Short version, it was my brake pad hitting. I had a warped rotor, and when the rotor spun around the warped area it would make contact with the brake pad and move it up in the calipor bracket, slamming it againt the bracket. hard to picture without seeing it in action. But to verify this is what i did. First off I knew it was brake related because the noise would stop if i touched the brakes, that is the first sign. Then i jacked he car, and took that wheel off, and spun then hub by hand, and sure enough i saw the brake pad move back and forth in the bracket. You have to spin the hub fast enough tho. Hope this helps.