GM Service Manual Online
For 1990-2009 cars only

Diagnostic Starting Point - Front Drive Axle

Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exist. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Front Drive Axle Description and Operation .

To diagnose the electronic operation of the front drive axle. Refer to Transfer Case Control Schematics in Tracker Transfer Case.

Classifying the Symptom

Front Drive Axle symptoms can usually be classified into the following categories:

    • Leaks
    • Noises
    • Vibrations

Leak and noise related symptoms are diagnosed with the Front Drive Axle section. For vibration related symptoms, refer to Diagnostic Starting Point - Vibration Diagnosis and Correction in Vibration Diagnosis and Correction for diagnosis.

Visual/Physical Inspection

    •  Inspect the system for loose or missing fasteners.
    •  Inspect the system for loose or leaking components.
    •  Inspect the system for obvious damage or conditions which may cause the symptom.

Symptoms List

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

    •  Noise Diagnosis - Front Drive Axle
    •  Front Drive Axle Noises
    •  Electric Motor Actuator Check
    •  Symptoms - Transfer Case