Begin the system diagnosis by reviewing the Rear Axle Disassembled Views and Rear Drive Axle Description and Operation and Wheel Drive Shafts Description and Operation. Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Rear Drive Axle in order to identify the correct procedure for diagnosing the system and where the procedure is located.