Hello, I have an 05 Sport Trac with a serious brake problem. My front passanger side caliper is locked up onto the rotor and won't release. The real problem is it just did that and I bought and replaced the caliper with a new one two weeks ago. When I changed it out last time I also replaced the brake pads and rotors on both sides on the front and just the new caliper on the passanger front side, which is where the problem is again. I also flushed and rebled the whole brake system with fresh brake fluid. During those two weeks it worked fine with no signs of problems but all the sudden it locked up again. The way it feels is if I had engaged the emergency brake on that wheel. Could I have just gotten a bad caliper or is there any other problem I should be looking at?