CAUTION: Do not fill the differential with oil to the level of the filler plug. The filler plug is used only to fill the differential with oil and is not a level indicator.
NOTE: The only way to check the differential oil level is to drain the oil completely and refill with the prescribed amount as stated in the specifications section.
1.
CAUTION: Do not work on a vehicle supported only by a jack. Be sure to support the vehicle securely.
Raise and support the vehicle.
2.
CAUTION: Do not loosen or remove the large protruding hex plug on the differential housing.
Remove the filler plug from the differential case.
- Clean the area around the filler plug.
- Place a container to collect any spilled oil.

3. Drain the oil from the differential.
- Clean the area around the drain plug.
- Remove the drain plug.

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4.
CAUTION: There are two ways to attach the drain plug. Check the method of attachment and observe the specified tightening torque (see below).
Screw in the drain plug.
- Clean the drain plug.
- Differentials with serial numbers prior to 254325: Tighten the hex drain plug to 54 Nm.
- Differentials with serial number from 254326: Tighten the 3/8-inch square drain plug to 28 Nm.
5.
CAUTION: There are two methods for attaching the drain plug. Check the method and the differential serial number and follow the specified tightening torque (see below).
CAUTION: Use oil that meets the prescribed specification and in the required quantity.
Fill the differential with the required amount of oil.
6. Screw in the filler plug.
- Clean the filler plug.
- Tighten the filler plug to 34 Nm.
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