Service Information

Volt

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 familiarise yourself with the system functions. Refer to Transmission General Description and Transmission Component and System Description .

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

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

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

•	Fluid Diagnosis

-	Transmission Fluid Level and Condition Check

-	Fluid Leak Diagnosis

•	Noise and Vibration Diagnosis

-	Whine/Growl Noise That Changes with Vehicle Speed

-	Noise in Drive or Reverse Gear

-	Noise and Vibration Analysis

•	Range Performance Diagnosis

-	No Park or Drive

-	No Drive in All Ranges

-	No Reverse Gear

-	No Drive or Reverse Gear

•	Shift Quality Feel Diagnosis

-	Harsh Garage Shift

-	Harsh, Soft, Delayed or Slipping Drive or Reverse Gear

•	Shift Pattern

-	No Drive in All Ranges

-	No Drive or Reverse Gear

-	Stuck in Drive or Reverse Gear

•	Symptoms Not Found or No Symptom Detected

-	Transmission Fluid Level and Condition Check

-	Line Pressure Check

-	Clutch Plate Diagnosis

-	Engine Coolant/Water in Transmission

-	Case Porosity Repair

-	Bushing and Mating Shaft Inspection