GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 Vibe - FWD 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Symptoms - Automatic Transmission

Diagnostic Category

Diagnostic Information

DEFINITION: The following table consists of seven diagnostic categories that are located in the left-hand column. Using this column, choose the appropriate category based on the operating conditions of the vehicle or transmission. After selecting a category, use the right-hand column to locate the specific symptom diagnostic information.

Fluid Diagnosis

This category contains the following topics:

    • Fluid condition - appearance, contaminants, smell, overheating
    • Line pressure - high or low
    • Fluid leaks
    • Refer to Transmission Fluid Check .
    • Refer to Line Pressure Check .
    • Refer to Fluid Leak Diagnosis .

Noise and Vibration Diagnosis

This category contains the following topics:

    • Noise - drive gear, final drive, whine, growl, rattle, buzz, popping
    • Vibration
    • Refer to Symptoms - Rear Differential Carrier .

Range Performance Diagnosis

This category contains the following topics:

    • No Park
    • No Reverse
    • No Drive
    • No engine braking
    • No gear selection
    • Refer to Vehicle does Not Hold in P Range .
    • Refer to Unable to Run in All Ranges .
    • Refer to No Engine Braking in 2 or L Range .

Shift Quality/Feel Diagnosis

This category contains the following topic:

Harsh shifts

Refer to Harsh Engagement into any Drive Range .

Shift Pattern

This category contains the following topics:

    • One forward gear only
    • Slipping
    • Refer to Fluid Discolored or Smells Burnt .
    • Refer to Harsh Downshift .

Torque Converter Diagnosis

This category contains the following topic

Torque Converter Diagnosis

Refer to Flexplate/Torque Converter Vibration Test .

If no symptoms are found
    • Refer to Transmission Fluid Check .
    • Refer to Road Test .
    • Refer to Line Pressure Check .