GM Service Manual Online
For 1990-2009 cars only

The mechanical components of this unit are as follows:

    â€¢ A torque converter with an electronically controlled capacity clutch (ECCC)
    â€¢ A drive link assembly
    â€¢ Four multiple disk clutch assemblies: Input, Second, Third and Fourth
    â€¢ Three friction bands: Forward band, 2/1 band and Reverse band
    â€¢ Two planetary gear sets: Input and Reaction
    â€¢ Three one-way clutches: a roller clutch (1-2 support) and 2 sprag clutches (Third and Input)
    â€¢ A final drive and differential assembly
    â€¢ A control valve assembly
    â€¢ A vane type oil pump

The electrical components of this unit are as follows:

    â€¢ Two shift solenoid valves
    â€¢ A torque converter clutch pulse width modulation (TCC PWM) solenoid valve
    â€¢ A pressure control (PC) solenoid valve
    â€¢ An automatic transmission fluid temperature (TFT) sensor
    â€¢ Two speed sensors: input speed and vehicle speed sensors
    â€¢ An automatic transmission fluid pressure (TFP) manual valve position switch
    â€¢ Either an internal mode switch (IMS) or an externally-mounted transmission range (TR) switch
    â€¢ An automatic transmission (A/T) wiring harness assembly

For more information, refer to Electronic Component Description .