When using the brakes at low speeds, one of the back brake "drums" make a loud obnoxious noise as if something is stuck in the brake. The brakes work fine, I replaced the front brake pads around 8000kms ago and had something done to the back brakes at the same time (not sure what). Front brakes are also making a noise, but just the normal "squeling" noise ( I have been told it could be dust between the brake pads).