High or Low Upshift or Downshift Speed. Buick Century 1997

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1997 🢒 Century 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T60-E 🢒 High or Low Upshift or Downshift Speed

Checks

Cause

Possible Diagnostic Trouble Code Set

•	Refer to the Shift Speed Chart

•	Check service bulletins

•	Incorrect tooth count on VS Sensor Rotor

•	Wrong PROM

•	Wrong final drive ratio or model

Possible Diagnostic Trouble Code Set

•	Refer to Shift Seed Chart

•	Wrong PROM

•	Check Service Bulletins

Possible Diagnostic Trouble Code Set

•	Refer to Shift Speed Chart

•	Check service bulletins