Proform GMC Muscle & Classic Car Differentials

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

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.

I'm sorry to have to tell you this, but the '64 GTO was not the first muscle car.

Who gets your pick as the best manufacturer from the golden age of the muscle car wars?

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

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

Need a little help Identifying GM Body Styles 1964-1972? Click Here!

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.