One of the most significant performance modifications you can make to a 4x4 to increase off-road prowess is the addition of a traction-adding device. Or better yet, two. Traction-adding devices ...

Your rear differential is one of the most unappreciated parts in your car or truck. It does what might be the hardest job of all of those components, multiplying torque from your transmission and ...

Begin final setup assembly by oiling the rear pinion support bearing, side bearings and races, bearing cap holes, spanners, and all case threads. For initial setup, use a .019-inch-thick pinion shim, ...

The first things you'll need to set up a rearend are the basic rebuild parts, such as new bearings, seals, shims, bolts, a crush sleeve and a nut. We used Reider Racing's "full" installation kit for ...

Which rearend is better? GM’s time-proven 12-bolt or Ford’s popular 9-inch. Each has its advantages and disadvantages. The Ford 9-inch is heavier and eats up more power due to a disadvantage in pinion ...