Review the system and operation in order to familiarize yourself with the system functions. Refer to Locking Differential Description and Operation or Limited Slip Differential Description and Operation .
| • | Inspect the system for the following: | 
| - | Loose or missing fasteners | 
| - | Obvious damage or conditions which may cause the symptom. | 
| • | Check the system for proper operation. Refer to Locking Differential Diagnosis . | 
Refer to a system diagnostic procedure from the following list in order to diagnose the symptom: