Transfer Case
WARNING: This page is about a different car, the 1988 Jeep Wrangler, 1988 Jeep Wagoneer, 1988 Jeep Grand Wagoneer, 1988 Jeep Comanche, and 1988 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Remove drain plug from transfer case. Remove fill plug for easier draining. With fluid fully drained, reinstall drain plug. Fill transfer case to fill plug opening with Dextron II.