same clunk wont go away!!

ok so to remind everyone, its a metal-to-metal sound clunk coming from the passenger fron. the noise is coming out of the center of the wheel and when it happens, the caliper jumps. things i have replaced:

-halfshaft
-pads
-rotor
-strut&spring

i have checked EVERYWHERE, ne ides please help. thanks much.

It sounds like a hub bearing to me. I had a Cavalier that did the same thing, the whole wheel would jump, especially when going from forward to reverse. It never made a growling noise while driving, but would clunk at parking lot speeds. It puzzled me and many of my mechanic friends, changed the hub out of desperation and the problem went away.