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 ...

Back in the '60s, parts tended to be over-engineered. Drivetrains especially were quite capable of handling that era's torquey high-output engines. In the intervening years power levels dropped, so ...

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 ...

ZF Friedrichshafen, an auto supplier to the likes of BMW and many others, is exploring a partial sale of its axle-assembly business amid an industrywide shift to electric vehicles, people familiar ...