As far as off-road performance goes, there's nothing you can do to your Jeep that will make as big a difference as adding a rear locker. And once you add a front locker, you'll be amazed at the ...

Installing a locking differential into your 4x4 is one of the best upgrades you can do. Understanding that a locker is what allows your wheels to spin at the same speed (no more one-wheel-peel), ...

Mark McNabb was a contributor at TopSpeed from 2013 to 2018. Growing up, Mark always had a mind for tinkering on random items throughout his home and dad’s garage, including a 1953 Ford Mainline and ...