Harbor Freight Tools has a small hand operated pump kit to change oil or differential fluid without removing drain plug or entire pan. This simple kit is part no. 3878 and is only $5.99. Someone on another thread referred to this pump and said he was buying several in case they quit carrying it. It can also siphon gas and once the gas begins to flow, it will flow without further pumping. I have read on this forum questions like how do I change my engine oil, ATF, or rear end fluid when I can't remove the drain plug or there is no drain plug. This pump is the answer.