The list of required tools is short. You need an Allen bit, a container to catch the used oil, a funnel or squeeze bottle with a hose to get the fresh oil in, a torque wrench, and oil-resistant gloves. Used gear oil stinks and you don’t want the smell to hang around on your hands, even after you wash them. You’ll also need hypoid gear oil, a new crush washer for the drain bolt, and a new O-ring if you can remember to pick one up. I didn’t so I give you a warning on that a little later.