I have 4 pot caliper with a sticking piston. I can spin the front wheel but you can hear it rubbing and the rotation is not as free/fast as I believe it should be. The pads are wearing faster under this particular piston than the others. I have replaced all the seals and meticulously cleaned everything and put it back together. It still did not retract as much as the other pots (you can see it moving back, just not as much as the other 3). I pulled it all apart again. Measured the pistons, all measure the same and then replaced them in different positions to see if it made any difference. It didn't. Pulled the whole lot apart again in case I missed something like a speck of dirt but nothing. Anyone have a suggestion, am thinking the rebate that houses the seal may be a thou or 2 shallower than the others.
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