rear caliper removal dilemma

[Val]

I have a 98 Explorer XLT with rear discs . Wanted to replace a chewed up rotor. Can't figure out how to remove the caliper as there are no caliper mounting bolts. Alldata says to remove 4 bolts, behind the wheel Now the bolts are spinning around and not coming off. Local mecanic says he never heard of such a setup and says to keep looking for torx or caliper retaining bolts.
Can anyone help?

Thanks!

 

[gijoecam]

If you've cranked the two bolts loose, the caliper comes right off. The bolts may be sticking in the slide pins..... If the whole pin spins, the bolt won't loosen.

-Joe