1989 Ford Bronco Rear Brakes locking up

  • 1 POST
  • 1989 FORD BRONCO

Brakes problem
1989 Ford Bronco V8 Four Wheel Drive Automatic 142456 miles

Hi, I had to perform a Brake job on my Bronco XLT 4DR. After bleading the brakes, I test drove it and the brakes were spoungy. I then replaced tha Master Cylinder. The Rear brakes then began locking up. I have retraced my steps disconnected the vaccuum hose from the power booster, they still locked up. I disconnected the RABS system and they still locked up. I then, while they were locked unhooked the rear line from the proportioning valve and the brakes imediately unlocked. I have come to three choices but I would like to hear from you. Is it possible that the new Master Cylinder, Proportioning Valve, or the RABS system is causing this problem when I did not have the problem prior to replacing the Master Cylinder? Which one would you choose to pursue first?

Do you
have the same problem?
Tuesday, July 7th, 2009 AT 11:48 PM

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