GM Service Manual Online
For 1990-2009 cars only

The mechanical components of this unit are as follows:

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

The electrical components of this unit are as follows:

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

For more information, refer to Electronic Component Description .