GM 6L80 Transmissions: How to Rebuild & Modify

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 series of transmissions has overtaken the 4L60E as the most popular rebuild in the majority of transmission shops and dealerships today.

Automatic transmissions are often seen as mysterious and overly complicated, but much of the guesswork has ...