33–06 All-Wheel-Drive Front
Axle Oil Changing
1. Drive the vehicle until the axle oil is warmed,
then park it, and chock the rear tires.
2. Jack up the front axle until the wheels are off the
ground, then secure the axle on jack stands.
3.
On vehicles equipped with an MT-11 front axle,
drain the oil from the differential.
On vehicles equipped with an MT-17 front axle,
drain the oil from the differential and the hubs.
3.1 Remove the oil-drain plug from the differ-
ential, and allow the oil to drain. See
Fig. 5.
3.2 If applicable, rotate each wheel until the
oil drain bore is at the bottom, then re-
move the drain bore plugs and allow the
oil to drain into a suitable container. If
needed use a bent piece of sheet metal
to direct the draining oil so it doesn’t
splash on the tires.
4. Fill the differential and hubs (if applicable) with
new oil.
4.1 Install the drain bore plugs in each hub
and the differential, then tighten the plugs
firmly.
4.2 Remove the plug from the oil level check
bore in each hub and from the fill-and-
check bore in the differential.
4.3 Fill the hubs and differential until the oil
level within each is even with the bottom
of the fill-and-check bore.
4.4 Install the check bore plug in each hub
and install the fill-and-check plug in the
differential. Tighten all the plugs firmly.
5. Lift the front axle off the jack stands, remove the
stands and lower the vehicle to the ground. Then
remove the chocks from the rear tires.
04/15/96
f350149
1
2
3
1. Vent Valve
2. Oil Level Check-and-Fill Plug
3. Oil Drain Plug
Fig. 5, All-Wheel-Drive Front Axle Differential
Front Axle 33
Business Class Trucks Maintenance Manual, June 2001 33/3
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