1975 - 1980 Ford Disc Brake Pressure Differential and Control Valve Kit


A Muscle Car Research Exclusive!

Muscle Car Research is proud to offer a rebuild kit for the D6DZ-2B257-C (marked D6DA-2B328-BB), D7DZ-2B257-A (marked D7DA-2B328-AB), and D9DZ-2B257-A (marked D9DC-2B328-AA) Ford disc brake combination pressure differential and rear brake pressure control valves made by Kelsey-Hayes and Wagner.  Our kit contains all of the parts needed to rebuild your leaky valve and return it to "like new" operating condition, including:

  • O-rings
  • X-rings
  • Proportioning valve seal
  • Proportioning valve spring
  • Copper crush washer

The contents of the kit can be seen in the picture above.  All of the rubber parts are molded from a 70 durometer ethylene propylene diene monomer (EPDM) rubber compound that is fully compatible with automobile brake fluid.  The spring is made from type 302 stainless steel and features squared and ground ends.  All parts are made right here in the USA! Are you unsure if this kit is for you?  Original applications include the following Ford and Lincoln/Mercury vehicles equipped with front disc brakes:

  • 1975 - 1980 Ford Granada
  • 1975 - 1980 Mercury Monarch
  • 1975 - 1977 Ford Maverick
  • 1975 - 1977 Mercury Comet
  • 1975 - 1980 Ford Pinto
  • 1975 - 1980 Mercury Bobcat
  • 1977 - 1979 Lincoln Versailles

Complete rebuild instructions are available from the Muscle Car Research web site. Dealer inquiries are welcome - please contact us for pricing.