Torque converter lockup clutch, function - GF27.20-P-5101-02N
Transmission 722.9 in model 171.4, 203, 209, 211, 215, 219, 220, 230, 463.303/340/341
Function
With an actuation triggered by the fully integrated transmission control (VGS) control unit (Y3/8n4) oil pressure controlled by the torque converter lockup clutch control solenoid valve (VGS) (Y3/8y8) is lead through the drive shaft (1) to the pressure chamber behind the piston (16d). The piston (16d) compresses the clutch pack (16c) and therefore enables direct torque transmission between the impeller (4) and turbine wheel (2).
The torque converter lockup clutch is engaged in all gears depending on engine speed and load.
The torsional damper damps the vibrations coming from the engine. This improves comfort for the driver and saves wear and tear on the mechanical components of the transmission.