Imo, just call/visit the dealer and buy/get free the washer from them. Then you can buy them heavyweight oil from them or another source. Then all you need is a cheap hand pump, and preferably a lift. Service manual is available in the how to section for reference. I had my front/rear fluids changed a while ago but I paid for it to be done for me. Probably worth drain and fill on your trans fluid too if you are looking at your diffs.