I seem to remember a rebuild kit that was available, but it required a special tool and some expertise...

If both rear brakes are wearing the pads out unevenly, then I'd be leaning toward contaminated brake fluid, not only would I bleed the brakes, but I would do a brake system flush if the fluid in your reservoir is anything other than transparent.

I spoze you could plug up the brake line when you remove it, but you have to bleed it after you put the caliper back on so why not let it drain into a small bottle?



ps. I got a junkyard caliper and rotor for $20

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Cheers,
Robert