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 ...

Despite their similar names, there are some notable differences between the 4L60E and 4L65E. These differences come in their ...

Using our normal bull-in-a-china-shop approach, we were able to get the wrong transmission behind an engine that it wasn’t designed for. Of course, we didn’t know that at the time, and built the ...

You likely had one of two reactions when you read "4L60E." It was either a slight shrug as you vaguely remembered that you had a 4L60E in your reliable, daily-driven ...

With their debut in the 1990s, GM's 4L60E and 4L80E transmissions reveal some of their differences –- and similarities –- right in their names. The "4" and "L" respectively refer to the number of ...