I have always had the diffs changed at the dealer and just sunk the wheeler this weekend. I drained the diffs, but can't seem to get the diff fluid from the bottle into the diff. It has the tapered top on the diff fluid bottle, but it just seems to run all over when I try to get it in, instead of going into the diff. Do you guys use a section of hose over the top of the bottle or what? I know that it sounds like a stupid question.