Service manual
 Section 2
2-34 
2.12.13 Transfer Case Oil
A. Transfer Case Oil Level Check
Figure 2–58. Every 250 hours of engine operation, check 
the transfer case oil level.
1. Level the vehicle, ground the carriage, place the 
travel select lever in NEUTRAL (N), engage the 
parking brake switch and shut the engine OFF.
2. Clean the area around the transfer case oil level plug 
and oil fill/vent cap (Fig. 2–59).
Figure 2–59. Clean the area around the
transfer case oil level plug.
3. Remove the oil level plug from the transfer case and 
check the oil level.
4. Add a premium grade of SAE 80W90 or SAE 80W140 
gear oil as required through the oil level hole or oil fill/
vent cap. Bring the oil level up and even with the oil 
level plug hole.
5. Clean and reinstall the oil level plug and oil fill/vent 
plug.
B. Transfer Case Oil Change
Figure 2–60. Every 1,000 hours of engine operation, 
change the transfer case oil.
1. Level the vehicle, ground the carriage, place the 
travel select lever in NEUTRAL (N), engage the 
parking brake switch and shut the engine OFF.
2. Clean the area around the transfer case oil level plug, 
oil drain plugs and the oil fill/vent cap (Fig. 2–61).
Figure 2–61.  Remove the oil drain plug from the transfer 
case to drain the oil.
3. Place a receptacle beneath the transfer case drain 
plugs.
4. Remove the drain plugs from the transfer case.
5. Allow the oil to drain completely into the receptacle. 
Transfer the oil into a container with a cover and label 
as used oil. Dispose of properly.
6. Clean and reinstall the transfer case drain plugs.
7. Remove the oil fill/vent cap and oil level plug.
8. Fill the transfer case with SAE 80W90 or SAE 80W140 
gear oil. The transfer case is full when oil is level with 
the bottom of the oil level plug hole. Total transfer 
case gear oil capacity is 1.5 qt (1,4 l).
9. Replace the oil fill/vent cap and oil level plug. Wipe 
up any spilled gear oil.
2.12.14 Wheels and Tires
A. Tire Pressure Check
Figure 2–62. Every ten hours of engine operation, check 
the air pressure in all four tires.
Check all four tires:
1. Remove the valve stem cap.
2. Check tire pressure using a premium-quality gauge. 
Proper inflation pressure cannot be determined 
visually. Pressure should be 65 psi (448 kPa) 
OS0910
250
MS2170
OS0722
Vent Cap
Oil Fill Plug
Oil Level Plug
Oil Drain Plug
OS0960
0001
MS2190
DANGER: LOW TIRE PRESSURE can result 
in vehicle tipover.
MAINTAIN proper tire pressure at all times.
OS0722
Vent Cap
Oil Fill Plug
Oil Level Plug
Oil Drain Plug
10
OS0900
MS2140
Model 3606 
• 
Origin 10/99










