1991 Lincoln Mark VII • V8 Automatic • 115,000 miles  1991
lincoln mark vii, ABS is not working. Too expensive to replace
parts. What Booster, Master cylinder,Adjustable proportioning
valve are needed? Your help would be greatly appreciated.
Thanks. Asked by June 21, 2011. Wow, I see what you mean about
cost. The best recommendation I can make is to find one or two
cars in the salvage yard that have the standard brake system and
use them for parts and reference. Your current hydraulic
assembly has the push rod included that attaches to the brake
pedal. That means the power assist comes from pressurized brake
fluid, (similar to hydro-boost systems that use power steering
fluid), and you will have to switch to a vacuum booster. Those
are very low failure items so you should be able to get one from
a salvage yard very inexpensively. You might get the master
cylinder with it, but don't get one that has had the cover
removed or any other part of the hydraulic system opened to
outside air. Brake fluid loves to abso