Automatic Transmissions

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

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

Learn how to measure wheel bolt circles with our wheel bolt pattern guide. Use this chart to make sure the rims you order match your wheel bolt pattern and fit your vehicle.

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.

Bert LMZ Exploded View

Exlpoded View of the Bert 1300 Late Model Racing Transmission

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

Should you mix bias-ply and radial tires? Get all the information you need with our guide on radial tires and bias ply tires, and why mixing is risky.

Roadster Expert Tim covers the various types of vintage wire wheels (1928-1935) found on early Fords and how to distinguish the differences between them.

Need better tire traction on the track? Read our guide on increasing traction with grooving, siping, and needling to ensure your racing tires have great grip.