Autoblog may receive a share from purchases made via links on this page. Pricing and availability are subject to change. Think your rear differential is due for some re-lubrication? Larry Kosilla is ...

As far as car fluids go, differential oil is one of the most neglected pieces of maintenance. It could be because the effects of not changing differential fluid on time aren't as immediately obvious ...

A fundamental part of any muscle car is a nice, strong rearend fitted with a limited slip or Posi unit. What good is it to make gobs of horsepower if you can only do one wheel burnouts or if the diff ...

The limited slip differential (LSD) is one of the greatest automotive achievements since the invention of the automobile itself. Yes, it helps transfer power to the ground under hard launches or ...

Let's be honest, the average person has never thought about whether differentials even have fluid. They're not like engines, which require oil changes after about 5,000 to 10,000 miles (or 12,500 if ...

Thanks to auburn gear, the chew 3-series 12-bolt posi is back! Chevy's beefy 12-bolt differential has always been the rearend of choice among Bow-Tie musclecar enthusiasts. Unfortunately, in recent ...