It doesn't slide much. The in side pushes against the rotor, pinching it against the outer pad. Then the in side slides back to clear the rotor. You can take the caliper back off, slip the pads out, spray hell out of everything with brake cleaner....get one of the little "ketchup pack" sized brake grease they keep on the counter at O'Reillys for .99 to use on the bolts. Yes torque 'em down good and snug.