Your rear differential is one of the most unappreciated parts in your car or truck. It does what might be the hardest job of all of those components, multiplying torque from your transmission and ...

It can be argued that there's no bigger bang-for-the-buck performance upgrade than new axle gears. Auto manufacturers are tasked with building a vehicle that is optimized for both highway efficiency, ...

Recently we tossed on a 4-inch lift and 33-inch Claws on a '97 Jeep Wrangler TJ that's equipped with an extremely tired 2.5L four-cylinder engine. Usually a tire that's only 33 inches tall won't rob ...