When adding fluid or refilling the transfer case, use Dexron® II automatic transmission fluid for most vehicles covered by this repair guide. However, there are indications that some models may have been designed to run with SAE 80W or SAE80W-90 GL5, so check your owners manual to be sure.
See Figure 1
When checking the fluid, the vehicle must be level. If it was necessary to raise and support the vehicle to access the filler plug, the vehicle must be supported at sufficient points (all wheels or 4 points on the frame) so it is sitting level and is not tilted forward/backward or to one side.
- If necessary for access to the filler plug, raise and support the vehicle safely using jackstands, but make sure the vehicle is level.
- Remove the filler plug (upper plug of 2) from the rear-side of the transfer case.
- Using your finger, check the fluid level, it should be level with the bottom of the filler hole.
- If the fluid level is low, use Dexron® II automatic transmission fluid (or gear oil when applicable) to bring the fluid up to the proper level. Most parts stores will carry a small, hand operated pump which will greatly ease the task of adding fluid to the transfer case.
- On all except the Bravada and the Typhoon, install the filler plug and torque it to 30-40 ft. lbs. (41-54 Nm). On the Bravada and the Typhoon, apply Loctite® to the filler plug and torque it to 80 inch lbs. (9 Nm).
DRAIN AND REFILL
See Figure 2
- Operate the vehicle in four wheel drive in order to warm the fluid to normal operating te