If you've kept tabs on our '04 4Runner build, you know we've been using an automatic locker in our Currie 9-inch rearend. The automatic locker has done everything we've asked: It's been self-contained ...

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 ...

We earn commissions from purchases you make using links in our articles. Learn more. Most of the time, it’s unnecessary to give your vehicle’s differential cover a second thought; the technology has ...