If you're going to drive your ride on the street an overdrive transmission makes it easier.

This video shows how to install the TCI 4x Four-Speed overdrive transmission.

When it comes to choosing a torque converter, many enthusiasts think it is black magic.

We talk with ATI Performance Products and TCI Auto to clear the air and help make the choice a lot easier. Find out more.

We upgrade the aging transmission in our Project Rehab Fox body Mustang with a new, stronger AOD from TCI Transmission. This new transmission will hold up to our planned upgrades, with the benefit of overdrive.

We get our project Biting the Bullitt one step closer to the street and strip by finishing up the installation of our TCI Super Streetfighter 4L80E transmission, including wiring and programming the EZ-TCU, as well as adding a cooler, pan and fluid.

Torque converters are the component that made the modern automatic transmission possible, transferring power from the engine to the rest of the drivetrain without the use of a clutch. Even though we've all used them, few of us understand what's actually going on inside or how they're built.