2008 ford sport trac when pulling onto highway traction light came on and brakes locked up would not go or able to stop brake pedal felt like a jack hammer when applying the brakes the only way to get the light off was to shut the truck down in the middle of the road ford has done nothing to fix the problem they know it is a sensor but it has 4 of them and they will not change all 4 to fix the problem. they would rather risk my life and anyone that maybe following me. *tr