Larry Kosilla is here to show you how to replace your rear differential fluid on this Wrenched. Think your rear differential is due for some re-lubrication? Larry Kosilla is here to show you how to ...

You can’t build a fast, reliable street/strip machine and ignore the rearend. Everyone talks about engines and transmissions, but very few talk about differentials. We believe that’s a mistake because ...

Quadruple-digit-horsepower 2003-2004 Terminator Cobras are so commonplace these days that it’s easy to forget the cars were designed for nearly one-third that figure. Add sticky tires, hard launches, ...

A differential plays an essential role in pushing or pulling a car in a straight line and efficiently and comfortably moving it through a corner. Basically, it’s a device that allows two sides of an ...

I have a 2007 Ford F-150 with the FX4 package, a little lift, and some larger-than-factory (28575R18) Toyo all-terrain tires. The truck has a ton of miles on it—nearly 200,000 miles—and I noticed the ...