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Figure 1-1 Spicer axles are identified with a manufacturing date and complete part numbers stamped on the right- hand tube. The part number may also appear on a metal tag attached to the cover plate by the cover screws, depending upon the requirements of the vehicle manufacturer. The part number, consisting of six digits reading from left to right, is the basic number for identifying the particular axle assembly. The seventh digit following the dash will identify ratio, differential, and end yoke options used in the assembly. The next group of numbers is the manufacturing date of the axle and is interpreted as follows. The first number is the month, the second number is the day of the month, the third number is the year, the fourth is the line that built the axle, and the letter is the shift. NOTE It is recommended that when referring to the axle, the complete part number and build date be obtained. To do this, it may be necessary to wipe or scrape off dirt, etc., from the axle housing. If the axle is unique on design such that the unit cannot be identified in the standard manner as described above, refer to the vehicle manufacturer’s service and/or parts manual for proper identification. SERVICING COMPONENTS NOT COVERED IN THIS MANUAL Service procedures for some components may not be covered in this manual because they are unique to the vehicle application. Refer to the vehicle manufacturer’s service manual for servicing those components. (e.g. brakes, hubs, rotors, and wheel end components). VEHICLE STORAGE OR PROLONGED INOPERATION If the vehicle has not been operated on a regular daily basis, it is recommended that the vehicle be operated at least once every two weeks. The vehicle should be moved far enough to cause the drivetrain components to make several complete revolutions. This procedure will help assure that all internal components receive adequate amount of lubrication to help reduce component deterioration caused by an undesirable environment (e.g. high humidity).