21.1 Control plugs (up) and drain (at the bottom) transfer case holes
22.2 Check plugs (up) and drain (at the bottom) holes in the front differential housing
3. The oil level must reach the lower edge of the hole (photo). If necessary, add oil with a pear or syringe. On vehicles with a self-locking differential, there is a plate on the gearbox housing indicating the recommended oil grade.
4. Replace the plug and tighten to the specified torque.