Payne, I went thru the same problems as you,I replaced calipers,Master cylinder,ect,and still had my brakes locking up,THE problem is the Brake Lines,Sure they may look perfect on the outside,with no visible cracks,or damage/rot,But what happens is the(rubber) brake lines rot from the inside,and BLOCKS or restricts the passage(the normal flow) or return of the brake fluid,(kinda like a dam on a river in reverse) which causes the wheels to "stick" or lock up,as the hydraulic pressure cannot be relieved,or is relieved very slowly because of the blockage or restriction, but of course when you apply the brakes,because you are applying hydraulic pressure against the "dam" (The restriction or blockage)it will allow the brake fluid to flow to the calipers,but when the pressure is removed,it cannot reverse flow,because of the blockage in the deterated rubber brake lines,hense the sticking or locking up of the brakes.But then again it could just be sticking or rust build-up in the brake calipers,from non- use.Either way they are very old rubber brake lines,and should be replaced anyway,the braking system is one area you do not want to skimp on.Hope this helps. Claude 000570 --- In dmcnews@xxxx, "Payne" <bpayne@xxxx> wrote: > Based on all of your advice and having my car in our shop today, I think > everyone's right about the problem. First we flushed the system A LOT with > fresh DOT 4, then I went for a drive and noticed the same gradually stiffer > brake pedal. After a few minutes of driving we pulled it on the lift and > all of the wheels were difficult to turn by hand. The tech relieved > pressure at a couple of the bleeder screws and the wheels were able to turn > freely again. So obviously pressure keeps building toward the calipers but > fluid is not returning to the resevoir. Therefore it's got to be a bad > master cylinder, right? I hope that's all, however I also need a new right > front caliper since one of the pistons is frozen in place. > > Oh well. I can't help but love the car no matter what happens. That's > something probably no other car in the world could do for me. > > payne