We realize the transmission fluid of an automobile’s automatic transmission is used to transfer the power from the engine to the drive shaft. But after watching this Department of Defense video from ...

Aisin has been granted a patent for a drive device that includes a fluid coupling and a rotary electrical machine. The device is designed to input torque from one side and output it from another side.

Every 1939 Custom Imperial Chrysler sold last week had as standard equipment a hydraulic clutch which eliminates any mechanical connection between the engine and the wheels. Called fluid drive.