TLDR: The 6L80 transmission is a six-speed automatic transmission made by General Motors. It was introduced in 2005 and is used in various vehicles.

The 6L80 transmission, along with its similar counterpart the 6L90, is an automatic transmission made by General Motors. It is used in a variety of vehicles and has been in production since 2005. The transmission is built at the Willow Run Transmission plant in Ypsilanti, Michigan. It is similar in design to the smaller 6L45/6L50 transmission, which is produced in Strasbourg, France.

One of the notable features of the 6L80 transmission is its clutch to clutch shifting mechanism. This means that it uses clutches to shift gears, rather than the one-way clutches used in older transmission designs. This allows for smoother and more efficient shifting.

The 6L80 transmission has a torque rating of 440 ft/lb (600 nm), while the 6L90 has a torque rating of 1220 ft/lb (2000 nm). This means that the 6L90 is capable of handling higher levels of torque.

In terms of specifications, the 6L80 transmission has a gear ratio of 6.0401 for the first gear, 1.4329 for the second gear, and so on. These gear ratios determine the speed and power output of the vehicle.

The 6L80 transmission is used in a wide range of vehicles, including the Cadillac XLR-V, Chevrolet Corvette, Holden Commodore, GMC Sierra, and many others. It has been used in various models from 2006 to the present.

In summary, the 6L80 transmission is a six-speed automatic transmission made by General Motors. It is known for its clutch to clutch shifting mechanism and is used in a variety of vehicles. It has been in production since 2005 and has a torque rating of 440 ft/lb (600 nm).