The 4L60E and 4L80E are two of General Motors’ most discussed automatic transmissions, and the choice between them shapes how a truck, SUV, or LS swap behaves on the street and under heavy load. Both ...

If you're a control freak, late-model electronic transmissions are just what you need to modernize your classic car, and if you decide to go that route, a transmission control module is a must-have.