Transmission Control Systems: Technical Service Bulletins

• Customer Interest
  • A/T - 4L80-E/4L80-EHD 1-2 Shudder or Double Bump
  • Drivetrain - Slow Or No Engagement of Front Axle
    • Overview
    • Service Procedure
  • A/T - No Upshift/Stuck in 1ST/No Codes/Exterior Leaks
• By Symptom
  • Customer Interest
    • A/T - 4L80-E/4L80-EHD 1-2 Shudder or Double Bump
    • Drivetrain - Slow Or No Engagement of Front Axle
      • Overview
      • Service Procedure
    • A/T - No Upshift/Stuck in 1ST/No Codes/Exterior Leaks
  • Erratic Shifting
    • A/T - No Upshift/Stuck in 1ST/No Codes/Exterior Leaks
  • Hard Shifting
    • A/T - 4L80-E/4L80-EHD 1-2 Shudder or Double Bump
  • Leaks
    • A/T - No Upshift/Stuck in 1ST/No Codes/Exterior Leaks
  • Won't disengage
    • A/T - No Upshift/Stuck in 1ST/No Codes/Exterior Leaks
• All Technical Service Bulletins
  • A/T - Shift Solenoid Update
  • A/T - 4L80-E/4L80-EHD 1-2 Shudder or Double Bump
  • Drivetrain - Slow Or No Engagement of Front Axle
    • Overview
    • Service Procedure
  • A/T - No Upshift/Stuck in 1ST/No Codes/Exterior Leaks
  • A/T - Holley Variable Pressure Control Solenoid