my right rear brake on my 2000 gt is giving me trouble. we thought we fixed the issue by replacing the pads and rotors but i guess not. what its looking like is the piston in the caliper closed but never really opened opened back up all the way. before the repair the pad pushed so hard against the rotor that it carved into it, which sucked. now it seems like its doing the same thing again with my brand new pads and rotors! any insight guys?