You push a truck hard enough – even a heavy duty model – and something’s going to give. When mechanic Dave Adair cracked the diff locker on his 2007 Chevy 2500 HD, he decided to step up to something ...

Horse Sense:When first installed, the Powertrax No-Slip Traction System is one noisy, clanking son-of-a-gun, but the metal-shop noises from our differential were hugely diminished after just 100 miles ...

4x4 utes have become essential tools for many tradies, as their rugged ladder-frame chassis and tough truck DNA mean they can easily carry tools plus a decent payload, tow a sizeable trailer and - if ...

In garages, on trails, and around campfires, debate will always rage over what single modification is most effective in creating a capable 4x4. Is there one magic mod that can dramatically improve ...

Pitching the stock differential out from under a GM car in favor of a 9-inch Ford has always been the best way to step up the drivetrain for drag racing. Since the price of used 12-bolts has ...