The three types of automatic transmission systems are hydraulic, electrical, and _______________.

The three types of automatic transmission systems are hydraulic, electrical, and mechanical.

Automatic transmission systems are designed to automatically change the vehicle's gear ratios as it moves, allowing for smooth acceleration without requiring manual gear shifting. Each type of transmission utilizes different methods for achieving this function.

1. Hydraulic transmissions use fluid to transfer power and shift gears, making the system rely on the principles of hydraulics for operation.
2. Electrical transmissions utilize electronic controls and motors to adjust gear settings, incorporating advanced technology for increased efficiency and responsiveness.
3. Mechanical transmissions may involve more traditional forms of engagement and power management using physical components, providing a direct connection between the engine and the wheels.

In modern applications, variations of these systems might combine elements from each type to optimize performance and efficiency in vehicles.