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 ...

Until recently, there hasn't been much in the way of selectable electric lockers outside of OEM applications. A couple of years ago there was the Detroit Electrac, but the unit was overly-complicated ...

You've already heard why four-wheeling without locking diffs is really two-wheeling, or in some cases, one-wheeling. The question is, what to do about it. The answers depend on what you drive, how ...