J2000/Sunbird V6-191 3.1L VIN T MFI (1994)
Torque Converter Clutch Solenoid: Description and Operation
Torque Converter Clutch Solenoid
PURPOSE:
The Transmission Converter Clutch (TCC) feature eliminates the power loss of the torque converter stage when the vehicle is in a cruise mode.
OPERATION:
The TCC system uses a solenoid operated valve in the automatic transmission to couple the engine flexplate to the output shaft of the transaxle
through the torque converter. This reduces the slippage losses in the converter, which increases fuel economy. For the converter clutch to apply, at
least two conditions must be met.
1.
Internal transmission fluid pressure must be correct.
2.
The ECM/PCM completes a ground circuit to energize the TCC solenoid in the transmission, which moves a check ball in the fluid line.
