On the bottom of the steering box you will see a plate held on with 4 bolts.Remove that plate. There should be a tube attached to that plate that runs up inside the box past the worm gear. This tube is supposed to keep the oil/grease from running out of the gear into the switch. Many times the tube has cracked loose from the plate and will need to be re-attached to the plate. You should be able to make this repair without removing the steering gear.