I have replace pads, rotor, caliper(twice), wheel hub. Bleed the system serveral times the pedl feels great and not spongy at all. I dont think its the master cylinder b/c the pedal doesnt sink at all. It continues to seize and is only the one wheel. Any ideas?
When it locks up, open the bleeder screw to see if it releases. If it does, next time crack the steel line loose at the master cylinder. You're looking for the place where it won't release to find where the fluid is being trapped from returning to the master cylinder. The rubber flex hose is always a good suspect.