Transmission Control Systems: Technical Service Bulletins

• Customer Interest
  • A/T - 4L80-E 2nd Gear only After A Cold Start/DTC 87
  • Drivetrain - Slow Or No Engagement of Front Axle
    • Overview
    • Service Procedure
• By Symptom
  • Customer Interest
    • A/T - 4L80-E 2nd Gear only After A Cold Start/DTC 87
    • Drivetrain - Slow Or No Engagement of Front Axle
      • Overview
      • Service Procedure
  • No shift/Incorrect gear engagement
    • A/T - No Upshift After Cold Start, Intermittent DTC 87
    • A/T - 4L80-E 2nd Gear only After A Cold Start/DTC 87
  • Out of specification
    • A/T - Zero Adapts With Scan Tool
• All Technical Service Bulletins
  • A/T - No Upshift After Cold Start, Intermittent DTC 87
  • A/T - Zero Adapts With Scan Tool
  • A/T - Shift Solenoid Update
  • A/T - 4L80-E 2nd Gear only After A Cold Start/DTC 87
  • Drivetrain - Slow Or No Engagement of Front Axle
    • Overview
    • Service Procedure
  • A/T - Holley Variable Pressure Control Solenoid
  • Drivetrain - Updated Transfer Case Speed Sensor Conn.