Learn how to rebuild and modify the GM 4L80E transmission! As the successor to the venerable and popular Turbo Hydra-matic 400 (TH400), the 4L80E was the next f

Although not quite the stout heavy-duty performer as its big brother, the Turbo 400, the Turbo 350 transmission is a fine, durable, capable, and when modified,

This resource explains how to rebuild and modify transmissions from both rear- and front-wheel-drive cars. It explains the principles behind the workings of all

Introduced in 2006, the 6L80 has become the most popular General Motors transmission in production today. Millions are on roads around the world, and the 6L ser

Over the last 50 years, literally millions of GM cars and trucks have beenbuilt with Turbo 400 automatic transmissions. While these transmissions are respected