Most off-road rigs have driveshafts, and where there are driveshafts there are universal joints. Straight front axles also have U-joints in the axleshafts that allow the transfer of power through the steering knuckle angle. Eventually, all of us experience a worn or broken U-joint that needs replacement. It’s a fairly easy job for a home mechanic and one that can help you keep going on the trail and save you some dough.
There are several means by which you can change a joint in a driveshaft or axle. These include using a hydraulic press, ball-joint press, beefy bench vise, or simply with a hammer or big rock out on the trail. Here’s the basic method using a bench vise.