Stock Car 31 Differentials

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.

Explore dirt stock car racing’s key terms, classes, rules, parts, and tips for success in this ultimate guide for new competitors.

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

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

Bob Larivee Sr. has accumulated some amazing stories over the course of his very long career. We sit down with him to talk about building a car show empire, going to Disneyland with Ed Roth, and meeting John and Yoko while hanging out with George Barris.

A short article explaining the main differences between open and limited slip differentials.

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

Get more details on Project Chevelle's 9-inch housing, third member, and tubular control arms installation.

What is the difference between 305, 360, and 410 sprint cars? From engines and horsepower to speed, cost, and racing series, both winged and wingless – we the racing experts from Speedway Motors break it down.

Get a good foundation on racing shocks and their different functions. Learn about the fundamentals and the pros and cons between various types of shocks available.