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), ...

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 ...