How to Check Lubricant

To get an accurate reading, the vehicle should be on a level surface.

1500 Series
1500 Series

A. Fill Plug
B. Drain Plug

All Except 1500 Series
All Except 1500 Series

A. Fill Plug
B. Drain Plug

• When the differential is cold, add enough lubricant to raise the level from 0mm (0 in) to 3.2mm (1/8 in) below the fill plug hole.
• When the differential is at operating temperature (warm), add enough lubricant to raise the level to the bottom of the fill plug hole.

    See also:

    Special Application Services
    • Allison Transmission™ Vehicles Only: Replace external transmission filter at first engine oil change only. • Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/ ...

    Driver Information Center (DIC) (Without DIC Buttons)
    If your vehicle does not have DIC buttons, the information below explains the operation of this system. The DIC has different displays which can be accessed by pressing the trip odometer reset stem l ...

    Transfer Case
    Refer to the Maintenance Schedule to determine how often to check the lubricant and when to change it. See Maintenance Schedule on page 11‑3. ...