31 Differentials

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

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

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

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 guide on identifying early Chrysler, Dodge, and Desoto hemi engines. In this two part guide, you will learn how to identify these engines and some history on what has become a legendary engine for hot rodding and racing.

In this Tech Tip, John answers a customer question about finding the right axle length for his 1931 Model A.

Tim talks about the process of adapting a full size 1932 Ford Radiator to fit in his 1929 Ford Roadster project.

Learn how and where to identify early Dodge, Desoto and Chrysler Hemi's by their identification numbers. This guide is for most automobile, industrial and marine applications.

Speedway Motors employee Tim M. decided to take us along as he takes another step in restoring a '32 Ford. This go-round he repairs an original '32 grille insert to put in his new shell.

Learn about GM alternator identification in our guide. We cover GM 3 wire alternators, 1 wire alternators, and externally regulated so you know what to choose.