Changed out rotors and pads on both front and rear. Brakes work fine, but I notice a clicking sound which is continous. Took tire and caliper off to see if I could see something touching. Is there a trick when taking off rear caliper with the emegency brake. I didn't remove the ER brake but could still get caliper back on. Someone please help me fix this. I don't think it's doing any harm but the sound is aggravating.