One of the most basic rebuilds on a 4x4 is a brake master cylinder. They often wear out but are simple to fix. Sure, rebuilt units can be had cheap on common vehicles, but not always for the ...
Brake fluid is stored in the master cylinder. When you step on the brake pedal, fluid goes from the master cylinder into the brake lines; when you release the pedal, the fluid flows back into the ...
Once every few weeks I kept having to stop at the local Ford dealer to replenish my brake fluid supply. (You are using Ford brake fluid aren't you?) Right away I knew that this was not a good sign.