Signals from the control module control the application and release of the hydraulic converter clutch. The control module applies and releases the hydraulic clutch by turning the converter clutch solenoid on or off. A solenoid is a type of electric switch that includes a wire coil. When current is applied, the coil is magnetized. The magnetic field moves a rod that opens and closes a hydraulic passage.

Hydraulic pressure is applied to the area between the converter cover and the clutch piston plate. A converter feed circuit in the valve body provides the hydraulic pressure.
When the converter clutch solenoid is not activated by the control module, the solenoid remains open. Line pressure bleeds through the solenoid. The fluid is routed through the converter front chamber, between the TCC and the converter cover.

Press play to continue.

Another method of connecting the engine and transmission directly is to use a torque converter clutch (TCC) with torsional dampening springs attached to the hub. The hub assembly is splined to the input shaft or turbine assembly.