Don't have a blown headgasket. My e-brake mechanism is good. It's just the rear brakes....someone mentioned to me maybe the proportioning valve is bad? what do you guys think? also I guess this is an intermittent thing...meaning it doesn't happen all the time. I drove my car to work today and on the interstate they started to grab again. I was gonna let someone look at my car so then I got back in it and noticed they weren't grabbing anymore. So I took it back on the interstate and they never grabbed while I was on it. I did 2 passes and both times nothing. It's weird.