Modified 10 Differentials

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

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

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

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

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

Devyn Peterson is an Auto Tech in the Speedway Motors Customer Experience center. He's also a racer, starting out in karts when he was just 5 years old. He moved up to a Modified when he was 13 and hasn't looked back!

Dirt modified racing delivers high-horsepower, adrenaline-fueled action, learn more about them and their racing classes

This article demonstrates how to install a complete Winters quick change kit with additional parts including birdcages, brackets, and calipers for a modified race car.

Read up on GM 10 bolt ring and pinion installation instructions. Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear.