LUBRICATION
| CAUTION | Transmission oil circulates between the transmission and the transfer case. In situations where transmission failures circulate debris into the transfer case, the transfer case must be disassembled, cleaned, and inspected for damage. See appropriate OVERHAUL article. |
SERVICE INTERVALS
Inspect the transfer case-power transfer unit rear drive module every 12 months or at engine oil change intervals. Manufacturer does not specify scheduled maintenance.
CHECKING FLUID LEVELS
To get an accurate reading, vehicle should be on level surface. Remove fill plug (2). (Scheme 12) If the level is below bottom of fill plug hole, add appropriate lubricant. See RECOMMENDED FLUIDS. Add enough lubricant to raise level to bottom of fill plug hole.
RECOMMENDED FLUIDS
Manufacturer recommends synthetic gear oil GM P/N 12378514 (United States), or P/N 88901045 (Canada).
DRAINING & REFILLING
Note. Numbers in parenthesis refer to callouts in designated illustration.
- Raise the vehicle.
- Remove the fill plug (2) and gasket. (Scheme 12)
- Place a container under the drain plug (1) in order to catch the oil. (Scheme 12)
- Remove the drain plug and gasket. Allow the oil to drain.
- Install the drain plug (1) and gasket. Tighten drain plug to specification. See «TORQUE SPECIFICATIONS»(ref-154798-S31990664812003052700000).
- Fill the transfer case with appropriate fluid. See «RECOMMENDED FLUIDS»(ref-154798-S16450243712003052700000).
- Fill the transfer case to bottom of the oil fill plug (2) hole. (Scheme 12)
- Install the oil fill plug (2) and gasket. Tighten drain plug to specification. See «TORQUE SPECIFICATIONS»(ref-154798-S31990664812003052700000).
- Lower the vehicle.
