I used to have this sound exactly.. My problem was that the shims that go with the rear brakes were worn and got loose.. So anytime they were desturbed it would click click click click.. drove me nuts.. I replacd the brakes and shimms. I also used some anti squeel goo that came with it.. The problem is no more.. My brake pads were not worn all the way but I replaced them just to have it done..Good luck man.. LaterZ