Hey Bill, It would sure help to know what components were rebuilt or replaced. All it says is that you rebuilt the "brake system". Did you rebuild or replace the master cylinder? What about the brake booster - was it also rebuilt or worked on? Or, did you just do work on the four wheels ? Were brake hoses replaced? Please elaborate and give accurate description of exactly what work was done. We can't really adequately help diagnose without more info as to which components were worked on, and which were not. Happy Thanksgiving to All John Hertog Sag Harbor NY ----- Original Message ----- From: "William Barrie" <blueweststudio@xxxx> After rebuilding the brake system on my G, I adjusted them to where I have good pedal and good stopping power. After hooking up the vacuum power assist and starting the car, the pedal drops somewhat and the brakes lock solid to where the wheels will not turn. I then backed out the adjustable nut on the master cylinder to the point where the wheels would turn but then the pedal would go almost to the floor before stopping the car. Also when I turn off the engine, the pedal comes up fully. Any idea of what's going on? Barrie