Every diesel truck on the road today has a differential and ring and pinion gear set in the rear axle. Four-wheel-drive trucks add a second set of gears and another differential to the front axle to ...

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 ...

In case your car's rear end is suffering from a leaky seal, or the bearings are a bit on the worn side, or (worse yet) you've destroyed it, don't fret—it isn't that hard to go through it and put ...

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 ...

Installation of a ring and pinion gear set is not a job for an amateur, especially if that ring and pinion set is going to see high-performance usage, such as drag racing. Setting up such gears is a ...