Begin the system diagnosis by reviewing the system Description and Operation. Refer to Front Drive Axle 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 Symptoms - Front Drive Axle in order to identify the correct procedure for diagnosing the system and where the procedure is located.