Ford has used "'open" diffs, Detroit Lockers, and several types of clutch-type limited-slip ('posi') units. Tom favors a properly prepared posi for most street/strip applications. The best Ford ...

Installing new gears and differentials is one of those jobs that even skilled mechanics and fabricators typically don't like to tackle at home for many reasons. Setting up gears requires specialized ...

Few things are more annoying than seal leaks of any kind. They stain the driveway and lose all-important lubrication at the same time. Even more frustrating is replacing a seal in a differential that ...