I need to replace, for the first time, the front rotors on my 1990 Toyota Corolla Sedan. There are two threaded holes in the rotor. I took off the caliper and the torque plate but the rotor will not come off. I don't think that the axle nut has to come off. Any help would be appreciated.
Thank You

Those threaded holes are for you to run metric bolts into. I don't recall the thread exactly but I think it's 8x1.25 (don't hold me to it), You thread the bolts in until they become snug. You then tighten them slowly, a little each taking turns. Sometimes it helps to tap the rotor as you tighten them. At some point the rotor should pop loose. Of course, I have had plenty of times where the thread simply pulled out of the rotor due to the rotor being stuck because of too much rust.

The rotor's "hat" has rusted on the hub. Either kick the rotor hard with the heal of your foot, smack it with a 32 oz. ball pein hammer, or screw two M8-1.25x40 cap screws into the two holes you noticed. This will break free the rotor. Before installing the new rotor, lightly coat the hub with grease. Remember to use brake cleaner to clean the cosmoline off the new rotor.

Both good tips. I like to spray PB Blaster into the stud area so it soaks between the rotor and hub. Then I rotate the rotor 180 and shoot it again so the liquid gets in the other side. Then try the metric bolts (also had the same experience as TX where the threads strip). You may have to destroy the old rotor with hammer to get it off.

Most important part of this job is cleaning the rust off the hub. If you don't you'll introduce lateral runout that causes rotor "warp." Read the post below

Eliminate rotor warp

If you're going to be replacing the brake rotors, first thing is to remove the caliper and frame.
Then clean the hub surface where the rotor rides and then with a sufficient persuader (hammer) stike the back of the rotor while turning slowly and 'walk' the rotor off the hub.
Finish cleaning the hub mating surface thoroughly so the replacement rotor will fit smooth and flush.