Dodge Ram Commercial2016, Owner'S Manual, Page: 597 / 675

Rear Axle And 4x4 Front Driving Axle Fluid Level
For models with 9.25 in Front Axles and 11.5 in Rear
Axles, refer to “Fluids, Lubricants, And Genuine Parts”
in “Maintaining Your Vehicle” for further information.
For normal service, periodic fluid level checks are not
required. When the vehicle is serviced for other reasons,
the exterior surfaces of the axle assembly should be
inspected.
When checking the fluid level (4500/5500 only), the
vehicle should be in a level position. The fluid level
should be ¼ in ± ¼ in (6.4 mm ± 6.4 mm) below the fill
hole on the front axle. The fluid level should be level with
the bottom of the fill hole on the rear axle.
Drain And Refill
On 4500/5500 vehicles, remove the lower bolt to drain
the axle fluid.
Refer to the “Maintenance Schedule” for the proper
maintenance intervals.
4500/5500 Rear Axle Plugs
1 — 4500/5500 Rear Axle Fluid Fill Plug
2 — 4500/5500 Rear Axle Fluid Drain Plug
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MAINTAINING YOUR VEHICLE 595