Proform Classic Truck Differentials

A new print and digital magazine about all things classic truck and more, brought to you by some familiar names.

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.

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

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.

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

These days, muscle cars aren't just for straight line blasts down the dragstrip. Here's a primer on some of the trick hardware that's available to make your muscle car into a corner carving Pro Touring car that can do it all.

Looking to change that old steering wheel out for something that's a better fit in your hot rod or classic? Speedway Motors offers a wide variety of steering wheel styles that look right at home in your vintage interior.

With the development of bias-look radial tires, hot rodders can get the vintage look of bias-ply tires with the excellent ride quality of a modern radial tire.