Every diesel truck on the road today has a differential and ring and pinion gear set in the rear axle. Four-wheel-drive trucks add a second set of gears and another differential to the front axle to ...

Selecting the best limited-slip or locking differential for your 4x4 depends on many factors, including the type of off-roading you do, how much time you spend off-road, your driving style and ...

With 350 hp underhood and an all-wheel-drive system to keep all those horses out of the ditch, the Ford Focus RS already offers a commute-friendly version of a Group B hatch, minus the wild body kit.

Front differential failures are extremely rare, but when they do start to fail, you may hear grinding, feel vibrations and have trouble steering. If you notice any of these symptoms, it’s best to have ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Changing the car differential oil—it's one of the most-overlooked maintenance tasks ...

All-wheel-drive systems are proliferating through the car market like so many tribbles on Kirk’s Starship Enterprise. These systems promise all-weather assurance as well as dry-road dynamic benefits, ...

For the most part, while their functions are deceptively complex, we're all familiar with a typical car axle. Being the method by which most cars mount their wheels, axles represent one of the most ...