Visual/Physical Inspection
Visual/Physical Inspection^ Inspect for aftermarket equipment and modifications which could affect the operation of the wheel drive shafts or other rotating components.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Thoroughly inspect the entire wheel drive shaft for visible damage, leaking joint seals, and missing seal clamps.
^ Inspect the wheel drive shaft seals for cuts, tears, or other damage which may allow the loss of lubricant and the entry of contaminates.