There is no easy way. You have to use a suction device of some sort and a tube to suck it out the best you can through that fill hole. Or you remove it from the car so you can dump it out through the filler hole. If I were you, I would not mess with the fluid unless you know it is really old. The aftermarket Muncie cases come with a drain plug. Autogear in Syracuse will drill and tap a hole for a drain plug.
