Last night i was driving home in my 1983 Chev work van, and the brake problem finally got "bad'... no brakes. For about a week, the brakes had been getting a little mushy, and brake fluid was dripping down the the booster, where the master cyl bolts on. I was hoping the brakes would last til the weekend, so i would have time to fix them. It got to the point yesterday, where i had to pump the brakes to get them to work, even with the fluid topped up in the master cyl. Anybody had this problem before ? I took apart the master cyl, honed it out with a brake cyl hone, and put new seals in it. I also found that the booster had been drawing in some of the brake fluid that had been dripping out the back of the master cyl, due to a bit of rust between the rubber seal and the booster where the rod sticks out... did the brake fluid wreck the booster ? I bench bled the master cyl, bolted it back on, and then pushed the brake caliper pistons back all the way, to try and force any air in the brake lines up to the master cyl resevoir. The brakes still are'nt working very good, though. I'll try bleeding them all the way through the calipers, and and see if that helps, but has anybody had a booster go bad before ? Right now, the pedal just sink's to the floor on the first pump on the brake pedal, and after pumping it a a couple times, it feels like the the pedal has some resistance behind it... but then after waiting a few seconds and pushing the pedal again, it sinks right back to the floor ! The front calipers, rear brakes, and lines are'nt leaking. Is the booster shot, or do i need to buy a new master cyl ?