Ford 8 Inch Racing Differentials

Learn why the Ford 9-inch rear end is the go-to axle for performance builds, and why this legendary rear end is trusted for high-horsepower applications

Learn how to ID a Ford 8.8 rear end by tag, width, and code. Compare 8.8 vs 9-inch axles, decode gear ratios, and find which Ford models used them.

Learn what gear oils do for your differential and how to choose the best gear lubricant for your application's needs

Learn how to assemble one of our bolt on nine-inch Ford disc brake kits in this step-by-step guide.

GM’s 10-bolt rear axle has been around since the 1960s, here’s how to determine if your junkyard find is worth taking home

Need help with rear end identification for your muscle car or hot rod? Learn how to identify 9-inch Ford housings and how to measure your axles with our diagrams.

A brief overview of the steps Speedway Motors takes to ensure you get a quality differential.

Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

In this Tech Tip, John responds to a customer looking to upgrade the 8” stock differential in his Cougar to a 9” open diff.

In this tech article, we discuss the pros and cons of the Ford 9-Inch and the Chevy 12 Bolt rear ends. Click here for our take on this classic debate.