Service Information

Spark

Symptoms - Automatic Transmission

Note: Use the symptom tables only if the following conditions are met:

•	Refer to Diagnostic Starting Point - Vehicle .

•	There are no DTCs set.

•	The control modules can communicate via the serial data link.

•	Review the system operation in order to familiarize yourself with the system functions. Refer to Transmission General Description and Transmission Component and System Description .

Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	Fluid Diagnosis

—	Transmission Fluid Level and Condition Check

—	Line Pressure Check

—	Fluid Leak Diagnosis

—	Oil Out the Vent

•	Noise and Vibration Diagnosis

Noise and Vibration Analysis

•	Range Performance Diagnosis

—	Unable to Run in All Ranges

—	First Gear Range Only - No Upshift

—	No Drive in Drive Range

—	No Reverse

—	Drives in Neutral

—	No Engine Braking in First Gear

—	Starter Solenoid Does Not Click

—	Range Selector Lever Cable Replacement

•	Shift Quality Feel Diagnosis

—	Harsh Park or Neutral to Drive Engagement

—	Harsh Park or Neutral to Reverse Engagement

•	Shift Pattern

—	Transmission Slips

—	Slips in Reverse

—	No 1-2 Upshift

—	No 2-3 Upshift

—	No 3-4 Upshift

—	Inaccurate Shift Points

—	Slipping 1-2 Upshift

—	Slipping 2-3 Upshift

—	Slipping 3-4 Upshift

—	Abrupt 1-2 Upshift

—	Abrupt 2-3 Upshift

—	Abrupt 3-4 Upshift

—	No Shift in All Ranges

—	Lack of Power or Hesitation

•	Torque Converter Diagnosis

—	No Torque Converter Clutch Apply

—	Engine Stall

•	Symptom Not Found or No Symptom Detected

—	Fluid Leak Diagnosis

—

Road Test

—	Stall Speed Test

—	Line Pressure Check