Frequency Of Fluid Change
Under normal operating conditions, the fluid installed at the factory will give satisfactory lubrication for the life of the vehicle. Fluid changes are not necessary unless the fluid becomes contaminated with water. Change the fluid immediately if contaminated with water.
See also:
Front Axle Fluid Level Check
The front axle oil level needs to be between 1/8 in (3 mm)
below the bottom of the fill hole and the bottom of the fill
hole.
The front axle fill and drain plugs should be tightened to
22 to 29 ...
Automatic Transmission – If Equipped
Start the vehicle with the shift lever in the PARK position (vehicle can also
be started in NEUTRAL). Apply the brake before shifting to any driving range. ...
Gross Trailer Weight (GTW)
The GTW is the weight of the trailer plus the weight of all cargo, consumables
and equipment (permanent or temporary) loaded in or on the trailer in its loaded
and ready for operation condition.
...