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 ...

There was a time when upgrading or swapping axles under your 4x4 often meant scrounging junkyards for factory axles under a rig a size bigger than yours. After finding a heavy-duty diamond in the ...

Few driveline components have reached the legendary status of the 9-inch Ford rearend. As a result, it's not unusual to find one under the tail end of almost anything with wheels, including Chevy ...

Drag racing is a brutal sport. Launching a car on a sticky track is hard on drivetrains and losing is hard on egos. If something breaks, not only does it hurt your wallet—it means you're loading up ...

Allison Transmission on Tuesday announced that it completed the installation of a new e-Axle production assembly line at its facility in Auburn Hills, Michigan. The purpose-built production line ...