Hydraulic transmission may refer to various transmission methods for transferring engine power to drive wheels, using hydraulic fluid:

• Diesel-hydraulic transmission, used in railway locomotives
• Hydrostatic transmission, using hydraulic motors to convert the fluid energy into rotary propulsion
• Hydraulic drive system § Hydraulic cylinder, using hydraulic rams acting on a swashplate or crank to convert the fluid pressure into rotation
• Hydrokinetic transmission, involving one or more torque converters; commonly used in railway locomotives
• Hydraulic automatic transmissions in automobiles manufactured in the mid-20th century, with trade names such as "Hydromatic"

See also

• Hydraulic machinery, machinery powered by hydraulic motors/hydraulic transmission
• Hydraulic (disambiguation)

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