#drive_line_system__drive_line__driveline  mechanism that transmits power from the engine to the driving wheels of a motor vehicle
  supertype:  mechanism  device consisting of a piece of machinery; has moving parts that perform some function
  part of:  motor_vehicle
  part:  driveshaft  a rotating shaft that transmits power from the engine to the point of application
  part:  driving_wheel__drivingwheel  a wheel that drives a motor vehicle (transforms torque into a tractive force)
  part:  live_axle__driving_axle__drivingaxle  the axle of a self-propelled vehicle that provides the driving power
  part:  transmission_system__transmission  the gears that transmit power from an automobile engine via the driveshaft to the live axle
     part:  clutch.coupler  a coupling that connects or disconnects driving and driven parts of a driving mechanism
        part:  clutch_pedal__clutch  a pedal that operates a clutch
     part:  fluid_drive__fluiddrive  an automotive power coupling
     part:  gearbox__gear_case  the shell (metal casing) in which a train of gears is sealed
        part:  transmission_shaft  rotating shaft that transmits rotary motion from the engine to the differential
  part:  universal_joint__universaljoint__universal  coupling that connects two rotating shafts allowing freedom of movement in all directions; "in motor vehicles a universal joint allows the driveshaft to move up and down as the vehicle passes over bumps"

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