Torque Converter Clutch Solenoid: Description and Operation

GF27.19-P-5111-01H Control solenoid valve, task
- TRANSMISSION 722.9
- Control solenoid valve lock-up clutch

Component Identification:

The torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8) is actuated by the fully integrated transmission control (VGS) control unit (Y3/8n4) and influences the position of the torque converter lockup clutch regulating valve. The clutch pressure in the torque converter lockup clutch depends on the regulating valve position and thus on the geometry of the torque converter lockup clutch regulating valve.

The torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8) has a rising characteristic. This means that the oil pressure applied in the torque converter lockup clutch regulating valve increases as the actuation current increases. In limp-home mode of the fully integrated transmission control (VGS) all the control solenoid valves are de-energized. The torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8) thus supplies no pressure.