Does the rear rotor slides off when you take out the caliper off likr the fronts?

 

That or you have to screw 2 screws into the rotor....cant remember.

 

Well the 2 screw's thingy is for the front if they are frozen in, but the rears dont have those 2 holes!

 

Then they should come off...might need to bang around with a hammer across the rotor near the studs.

 

you can try using the bolts that hold your brake caliper bracket in place to get them off.
there was a thread about 2 months ago where somene took those bolt and screwed them on really tightly, without that bracket in place, and it pushed the rotor off from the back side.