Hydraulic transmission

Hydraulic transmission may refer to:

Hydrostatic transmission, see Hydraulic drive system and Hydraulic machinery
Hydrokinetic transmission, involving one or more torque converters; commonly used in railway locomotives
A means of transmitting engine power to propel a vehicle using hydraulic rams acting on a swashplate attached to drive wheels
Hydraulic automatic transmissions in automobiles manufactured in the mid 20th century, with trade names such as "Hydromatic."

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