AC TH400 Automatic Transmission Parts

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.

Learn about the functionality of key parts in a hot rod air conditioning system for install or diagnosing issues. We cover the condenser, compressor and more.

Learn how to install a side detent shifter in a 1969 Chevy C10.

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

Learn about how aftermarket transmission coolers can help keep your transmission cool and the different options available for cooling with our expert guide.

How to plan and execute a LS swap into any 1973-1987 Chevy/GMC K10 pickup truck.

Learn how to install an external Transmission Cooler, to help keep the temperature of your transmission consistent.

LS swaps are nothing new, but they're still a little mysterious to some of us. Here is an overview of what you will need and what you need to know to swap some modern performance into your muscle car, truck, or hot rod!

Learn how Zach replaces a transmission and breakaway converter in his 55 Chevy, with some helpful tips along the way.