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Home >> Chevrolet >> 2006 >> Uplander Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - 4T65-E - Service, Diagnosis & Troubleshooting >> Diagnostic Information & Procedures >> High or Low Upshift or Downshift Speed

High or Low Upshift or Downshift Speed

High or Low Upshift or Downshift Speed

Checks Cause
DEFINITION: An upshift or a downshift or TCC apply, that occurs at a speed outside of the calibrated range. Refer to Shift Speed .
ECM/PCM Calibration Information Incorrect calibration in the ECM/PCM.
Throttle Position (TP) Sensor Misadjusted or faulty TP sensor.