Just taken everything off the drivers side. Now cause it's in 2wd I can hear a drag on the disc as I spin it. It's continuous so there is not buckle. Had other half press break pedal and no movement from caliper. Piston seems as far as it will go in so can the inside of caliper degrade with age? All looked good when I rebuilt but you can't see slight imperfections. There should be no noise when it spins. Will check mounts as well going out again for round 2