Torque Converter Diagnosis: Notes
WARNING: This page does not describe the selected car, but rather 36 other vehicles, including the 2002 Pontiac Firebird, 2002 Oldsmobile Bravada, 2002 GMC Yukon XL, 2002 GMC Yukon, and 2002 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For additional torque converter information, see appropriate OVERHAUL article.
The Torque Converter Clutch (TCC) is applied by fluid pressure, which is controlled by a PWM solenoid valve. This solenoid valve is located inside of the transmission assembly. The solenoid valve is controlled through a combination of computer controlled switches and sensors.