Check the master cylinder. It could be stuck partially and not returning fully. This would not allow fluids to return and after a short period of driving, the brakes would seize.
Ensure there is sufficient free travel between brake pedal and booster pushrod.
One other thing that can cause the front brakes to seize would be bad flexible hoses. They can go bad and only allow fluids to travel one way.
Tuesday, January 17th, 2012 AT 1:59 PM