I have a 1995 Plymouth Grand Voyager with 83000 miles. Recently, the brakes have been sticking like there is a build up of pressure. I have replaced the brakes all around. I have also replaced the rear wheel cylinders, calipers, front brake lines, master cylinder, proportioning valve and gallons of fluid. My dodge dealer had it for two days and told me the problem was the abs unit. When I replaced it, the problem was worse. It is only the front brakes that are sticking to the point where it will not drift and I have to use the gas to go down hill. The brakes do release after an hour or two, but the problem comes back after a few miles of driving. No, I am not using it, it is parked. The dealer could not find any problems with any sensors or computers. Any ideas?