Torque Converter Lockup Clutch Control Pressure, Function - GF27.60-P-3019ANR

Transmission 725.0 (except 725.096) in model 257, 290 

up to model year 2021 

Function requirements for torque converter lockup clutch control pressure, general 

• Circuit 15 ON
• Combustion engine running

Torque converter lockup clutch control pressure, general 

The torque converter lockup clutch is operated at specified slip speeds. To make this possible, variable control pressure has to be applied to the torque converter lockup clutch regulating valve.

The torque converter lock-up clutch control pressure is adapted to the respective operating condition via the torque converter lockup clutch solenoid (Y3/8y20), which is actuated by the control unit for the fully integrated transmission control electric controller unit (Y3/8n4).