LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 154 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Troubleshooting) >> Delayed Shift 1 to 2

Delayed Shift 1 to 2

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
Delayed Shift 1 to 2

Checks Cause
AT Output Shaft Speed Sensor Assembly (22)
  • A pinched or broken wire
  • A loose connector
  • An incorrect air gap
  • An inadequate signal
  • Coil damage
AT Input Shaft Speed Sensor Assembly (22)
  • A pinched or damaged wire
  • Coil damage
  • An inadequate signal
AT Fluid Pressure Manual Valve Position Switch Assembly (40)
  • A loose connector
  • A pinched wire
  • No signal to the PCM
  • Loose bolts causing leakage
Calibration PROM Incorrect
Check the PCM for current DTCs.
scientia non olet · About LEMON Manuals