Yesterday,one of the few days my radio was turn down,I was hearing a slight squeal coming from the one of my brake assy. It also seems to drag that wheel at times also,as it sometimes has a mind of it's own and decides not to release the rotor,causing it to glaze's the pad/glaze the rotor. So do I buy a new/rebuilt caliber from one of the Dodge parts house's or buy the rebuild kit, which include's a new piston. Pads after 50,000 miles have 2/3 pad material left. Thought's ?