Torque Converter Lockup Clutch Regulating Valve

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Torque Converter Lockup Clutch Regulating Valve

Courtesy of DAIMLERCHRYSLER CORP.

1 - TORQUE CONVERTER LOCK-UP CLUTCH

2 - TORQUE CONVERTER OUTPUT

3 - TORQUE CONVERTER INPUT

4 - LUBRICATION

5 - TORQUE CONVERTER LOCK-UP SOLENOID

6 - TORQUE CONVERTER LOCK-UP CLUTCH REGULATING VALVE

7 - OIL COOLER

8 - LINE PRESSURE REGULATING VALVE

9 - OIL PUMP

The torque converter lockup clutch regulating valve (6) regulates the torque converter lock-up clutch working pressure (p-TCC) in relation to the torque converter clutch control pressure (p-S/TCC). According to the size of the working pressure (p-A), the torque converter lockup clutch is either Engaged, Disengaged, or Slipping. When the regulating valve (6) is in the lower position, lubricating oil flows through the torque converter and oil cooler (8) into the transmission (torque converter lockup clutch unpressurized). In its regulating position (slipping, torque converter lockup clutch pressurized), a reduced volume of lubricating oil flows through the annular passage (7) bypassing the torque converter and passing direct through the oil cooler into the transmission. The rest of the lubricating oil is directed via the throttle "a" into the torque converter in order to cool the torque converter lockup clutch. See Fig 1.