Need to find out the size of the allen/hex wrench to remove filler plug
Locate the fill plug in the center of the transfer case facing the rear. The fill plug is a hex head bolt.
Remove the fill plug and check the fluid level. Insert the short end of an L-shaped Allen wrench into the hole. Spin the Allen wrench slightly and remove it. Some fluid should be present on the tip if the unit is full.
Attach a screw-on hand pump to a bottle of Mopar ATF+4 type 9602 automatic transmission fluid. Insert the other end of the tubing for the hand pump into the fill plug hole on the transfer case.
Pump fluid into the transfer case until the fluid is flush with the bottom of the hole. A small bead of fluid will drip out of the hole when the case is full.
Reinstall the fill plug and torque it to between 15 and 25 foot-pounds of torque. Hand-tightening the plug and turning it 1/2-half turn further with a socket wrench is equivalent to 20 foot-pounds of torque if you do not have a torque wrench available.
Park your car in a safe place and make sure you have enough space to work around it.Raise the vehicle using a floor jack and safely support it on two jack stands. If you have a four-wheel drive model, the transfer case is located center-left of the car. Lift the left side and position the jack stands near the front and rear wheels. If you have an all-wheel drive model, the transfer case is an integral part of the transmission. Lift the front of the vehicle.Working from underneath the vehicle, locate the drain plug at the bottom of the transfer case and place a drain pan underneath. Using a wrench or ratchet, remove the drain plug. After all the transfer case fluid has been drained, reinstall the drain plug. Do not over-tighten the plug to avoid damaging the threads. Remove the drain pan from underneath the vehicle.Locate the filler plug on the side of the transfer case. Clean the filler plug and the area around it using a shop rag; this avoids contaminating the new transfer case fluid. Using a wrench or ratchet and socket, remove the filler plug. Add the new fluid to the case using a small funnel. Add oil until it reaches the bottom of the filler hole, then reinstall the filler plug but do not over tighten it.Lower the vehicle.
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