What type of transmission is used in the HMMWV?

The High Mobility Multipurpose Wheeled Vehicle (HMMWV) utilizes the Turbo Hydra-Matic 4L80-E four-speed automatic transmission. This transmission is specifically designed to handle the demands of off-road driving and military operations, offering robust performance and reliability in various terrain conditions.

The 4L80-E is known for its ability to manage high torque, which is essential for vehicles like the HMMWV that may be loaded with heavy equipment and personnel. This transmission features a combination of hydraulic and electronic controls, allowing for smoother shifts and improved efficiency compared to older automatic transmissions.

In military applications, the use of an automatic transmission helps reduce driver fatigue and provides more focus on navigation and tactical maneuvers, especially in challenging environments. The HMMWV's design prioritizes versatility and capability, making the Turbo Hydra-Matic 4L80-E the ideal choice for this multifaceted vehicle.