I heard an unusual "clanking" sound when.

I heard an unusual "clanking" sound when accelerating and discovered that my rear driver's side brake caliper had sheared the lower cylinder slide pin. This allowed the caliper to swing back in acceleration and "clank" against the inside of the wheel.

I removed the caliper from the mount, disconnected the fluid line, unpinned the brake pads and attempted to pull the cylinder slide from the caliper. No luck.

? Is there a trick to freeing the slide pin from the caliper, or am I better off just buying a new caliper?

Ive tried tapping it out, also tried to unscrew it, but it doesn't seem to be threaded.

Thanks in advance for any responses!