Rear brake caliper piston sticking
 

(This was also posted on the Brake Forum so dont answer twice if you seen this there.)
86 GXL

I have the caliper that the piston twists in and out well it goes out fine but I can turn it and turn it and it wont go back in. Is there any way to fix this? ALSO I cant find anything on rebuilding the rear caliper the HAynes manual says due to the complexity of rebuilds you should leave this to a mechanic. Is this true or is pretty easy?

Also with the caliper off wheels off and ass end jacked up in neutral and parking brake off how easy should it be to turn the rear axle- is it somewhat stiff because your turning everything inside the rear end? or should it spin pretty easy?

www.mazdatrix.com Get their caliper rebuilding kit. Works well.