4L80E Muscle & Classic Car Frame

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

Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

A real-world guide to 4L60 transmission specs, strength, and swap tips.

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

This old sedan was untouchable in the early 60's.

In this episode of our C10 build series, we swap cams in a junkyard 5.3 and make surprisingly big power.

This is more than the story of a vintage sprint car. It's also the story of how a dynamic duo of "Speedy" Bill Smith and Jan Opperman toppled giants at the 1976 Hulman Classic.