Since you are doing two of them, it is not very expensive to get a pump that fits on top of a five gallong bucket. You then go to your wholesale oil company and get a five gallon bucket of diff lube and mount the pump. When you're done, throw a drop cloth of some sort over it and store it away. You will now have what you need to change diff lube for MANY years to come and it won't cost that much to get set up.