Stock Car Differentials

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

Comparing open diff vs limited slip vs locker differentials. Learn how each works, pros and cons, and which is best for your build.

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

The pros and cons of a welded diff vs open diff, plus what to know before learning how to weld your differential.

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

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

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

Why the budget-friendly Hobby Stock class is grassroots motorsports at its finest, and perfect for first-time dirt track racers.

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

Read how to lower the rear of your 92-98 Chevy pickup using a DJM lowering kit. These tips are helpful for smooth completion.