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 ...

Lockers are expensive and open diffs suck-a-duck off-road, so for chump-cheap traction, it’s hard to beat the age-old method of simply welding up your differential spider gears to create a mini spool.