k....well my back brakes were a lil busted (squecking) so it was time to change them and turn the rotors. well i took them off all fine (had to hit the hammer a few times to bust them off). well everything went back on but the brackets for the calipers have 2 "pistons" that are supposed to go in and out to let the caliper move in easily and get into place. well 3 outta 4 of those "pistons" are ceased and i cannot move the rubber boot and slide the piston in and move them. they are flat out ceased. ive tried a vise and penatrating fluid. last thing i want/need to do is replace them. just curious if someone has had this problem and/or fixdd this. wish i knew about brakes before i owned my car so i could grease them every so often and not get dicked over by a simple brake job....thanx