1. Insure that the axle has been filled to the correct level with 
    proper hypoid lubricant before driving the vehicle. 
    The oil rating must be GL5 or higher.   

2. Bring the axle to normal operating temperature by driving the 
    vehicle (unloaded) for approximately 15 to 20 miles. Do not
    run full throttle accelerations or create any shock loads. 

3. Let the axle assembly cool completely. 

4. For the next 200 miles of operation, drive gently, without any
    heavy loads.

5. If trailer towing is intended, an additional cycle of 200 to 300
    miles of break-in is required without the trailer. This is important!
    To properly break-in a new gear set, a minimum of 500 miles of
    driving is essential before towing.