This gearbox has two kinds of a refueling port in the gearbox oil drain screw directly above the top of the gearbox! There is also a kind of oil screw is a set of wire, remove the oil screw in the middle of the screw is a small screw inside a pipe with oil equipment to pump oil into the! If you can't find it, you can check the dipstick from the gearbox and fill it up! I hope my answer can help you, car problems, ask the car guru! If you do not know welcome to ask.