I did this service myself also and found the drill driven pump from Home Depot (about $5) was worth it's weight in gold!! Takes two people to operate, but I am sure with a little imagination it could be done by one person. With this pump you can fill the transfer case, and transmission in about 2-3 minutes each. Takes a little longer for the gear lube for the pumpkins to go through as it is a little thicker. 100% recommend this pump for this service. Good Luck!!!!