Has anyone replaced the rear brake pads? I had a heck of a time getting the caliper piston screwed back in to allow the new pads to fit in? After I got new pads installed, I lost brake pedal, have to pump the brake pedal to get any brakes, is there a adjustment to make? Hand brake works good does hold vehicle when in gear and @ idle. I'm afraid I may have to replace the rear calipers, any suggestions? And no I did not open any brake lines or bleeders, in case someone asks.