Torque Converter Clutch (TCC) and Lubrication Circuits TCC Released
Pressure for TCC release is supplied by the main pressure regulator valve to the TCC control valve through the CONV FD circuit. The CONV FD circuit also supplies lubrication for the differential. When the TCC is released, the TCC control valve is positioned by the TCC solenoid to direct CONV FD pressure to the TCC RELEASE circuit to release the TCC. TCC RELEASE pressure returns to the TCC control valve through the TCC APPLY circuit. The position of the TCC control valve opens the TCC APPLY circuit to the COOLER FD circuit which allows the transmission fluid returned from the torque converter to cycle through the thermal bypass valve circuit when the TFT is below 80 °C-93 °C (176 °F-200 °F) or the transmission fluid cooler when the temperature is above 80 °C-93 °C (176 °F-200 °F).
Return transmission fluid from the thermal bypass valve or the transmission fluid cooler supplies transmission lubrication through the LUBE circuit which runs through the input shaft.
For lubrication passage location and description, refer to Hydraulic Circuit Identification Chart .
The position of the TCC control valve is controlled by pressure from the TCC solenoid through the VBS TCC circuit. The TCC solenoid is controlled by the PCM.