Transmission Control Systems: Technical Service Bulletins

• Customer Interest
  • A/T - 1-2 or 2-3 Slip/Flare, Launch Shudder & DTC P1870
  • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
  • A/T - Engine Speed Flare During Part Throttle Downshift
  • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
• By Symptom
  • Customer Interest
    • A/T - 1-2 or 2-3 Slip/Flare, Launch Shudder & DTC P1870
    • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
    • A/T - Engine Speed Flare During Part Throttle Downshift
    • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
  • Hard Shifting
    • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
  • Hunting-Surging
    • A/T - Engine Speed Flare During Part Throttle Downshift
  • No shift/Incorrect gear engagement
    • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
  • Slipping
    • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
  • Sticking/Binding
    • A/T - Park/Neutral Switch Connector Cannot Be Removed
• All Technical Service Bulletins
  • A/T - Revised Diagnostic Information
  • A/T - 1-2 or 2-3 Slip/Flare, Launch Shudder & DTC P1870
  • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
  • A/T - Engine Speed Flare During Part Throttle Downshift
  • A/T - Park/Neutral Switch Connector Cannot Be Removed
  • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder