Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Description And Operation

• Description and Operation
  • Definitions and Abbreviations
    • Throttle Positions
    • Shift Condition Definitions
    • Noise Conditions
    • Driver Shift Control
    • Transmission Abbreviations
  • Transmission Identification Information
  • Transmission General Description
  • Transmission Component and System Description
  • Shift Stabilization Description and Operation
  • Manual Mode Description and Operation
    • Transmission Gear Shift Lever
    • Transmission Manual Shift Switch - Up/Down
    • Transmission Control Module
    • Manual Mode Shifting Operation
  • Tow/Haul Mode Description and Operation
  • Transmission Adaptive Functions
  • Transmission Indicators and Messages
  • Electronic Component Description
    • Notes
    • Control Solenoid (W/Body and TCM) Valve Assembly
    • Internal Mode Switch (IMS)
    • Input Speed Sensor (ISS)
    • Output Speed Sensor (OSS)
  • Automatic Transmission Inline 16-Way Connector Description
  • Park - Engine Running
    • Notes
    • Fluid Pressure Directed in Preparation for a Shift
    • Park - Engine Running - A/T System Hydraulic Diagram
  • Reverse
    • Notes
    • Fluid Pressure Directed in Preparation for a Shift
    • Low and Reverse Clutch Applies
    • 3-5 Reverse Clutch Applies
    • Reverse - A/T System Hydraulic Diagram
  • Neutral - Engine Running
    • Notes
    • 3-5 Reverse Clutch Releases
    • Neutral - Engine Running - A/T System Hydraulic Diagram
  • Drive Range, First Gear Engine Braking
    • Notes
    • Fluid Pressure is Directed to the 1-2-3-4 Clutch and the Low and Reverse Clutch to Provide Engine Braking
    • 1-2-3-4 Clutch Applies
    • Drive Range, First Gear Engine Braking - A/T System Hydraulic Diagram
  • Drive Range, First Gear
    • Notes
    • Low & Reverse Clutch Releases
    • Drive Range, First Gear - A/T System Hydraulic Diagram
  • Drive Range, Second Gear
    • Notes
    • Second Clutch Applies
    • Drive Range, Second Gear - A/T System Hydraulic Diagram
  • Drive Range, Third Gear
    • Notes
    • 3-5 Reverse Clutch Applies
    • 2-6 Clutch Releases
    • Drive Range, Third Gear - A/T System Hydraulic Diagram
  • Drive Range, Third Gear Default
    • Notes
    • 1-2-3-4 Clutch Stays Applied
    • 3-5 Reverse Clutch Applied or Applies
    • Drive Range, Third Gear Default - A/T System Hydraulic Diagram
  • Drive Range, Fourth Gear
    • Notes
    • 4-5-6 Clutch Applies
    • 3-5 Reverse Clutch Releases
    • Drive Range, Fourth Gear - A/T System Hydraulic Diagram
  • Drive Range, Fifth Gear
    • Notes
    • 3-5 Reverse Clutch Applies
    • 1-2-3-4 Clutch Releases
    • Drive Range, Fifth Gear - A/T System Hydraulic Diagram
  • Drive Range, Fifth Gear Default
    • Notes
    • 3-5 Reverse Clutch Applies
    • 1-2-3-4 Clutch Releases or 2-6 Clutch Releases
    • Torque Converter Clutch Releases
    • Drive Range, Fifth Gear Default - A/T System Hydraulic Diagram
  • Drive Range, Sixth Gear
    • Notes
    • 2-6 Clutch Applies
    • 3-5 Clutch Releases
    • Drive Range, Sixth Gear - A/T System Hydraulic Diagram
  • Fluid Passages
    • Torque Converter Housing - Fluid Pump Cover Side
    • Fluid Pump Cover - Torque Converter Housing Side
    • Fluid Pump Cover - Case Side
    • Case - Top Channel Plate Side
    • Control Valve Upper Body Assembly - Case Side
    • Control Valve Upper Body Assembly - Bottom Channel Plate Side
    • Control Valve Upper Body Assembly - Control Solenoid Valve Assembly Side
    • Control Valve Lower Body Assembly - Control Valve Upper Body Assembly Side
    • Control Valve Body Spacer Plate Assembly - Bottom Channel Plate Side