I thought it was a binding caliper, i put a caliper kit in but still the sound persists, sound like the backing plate scratching on the disk every rotation, but it`s not this either, this may help someone give me the answer, on de-acceleration or coasting the sounds there, on acceleration it stops, it souns too scratchy to be rear wheel bearing and not crunchy enough to be c.v. joint. does this give any one any ideas, help please it`s driving me nuts and seems to be getting worse.