Performance cars have limited-slip differentials, period. The "One Wheel Peel Deal" isn't any more acceptable than running 17s in the quarter-mile. Unfortunately, it seems the only way to get both ...

Why has the Ford 9-inch axle become the go-to axle for Ultra4 racing and hardcore use? It has a lot to do with the evolution of the axle assembly from the factory-built unit, to custom-fabricated axle ...

The days of going to your local wrecking yard and picking up a good Ford 9-inch rearend for your hot rod project are coming to an end. That sturdy and versatile unit was last produced for passenger ...

For over half a century, the Ford 9-inch rearend has been the king of aftermarket axle upgrades. Few other axles enjoy the same amount of bolt-on and custom componentry. The Ford 9-inch is a great ...