WOW, way to ressurect this post!
I am planning on doing the same in the next couple of weeks. I would disconnect the upper hose and use that as your drain. The upper hose is the output from the tranny. The lower hose is the input. You would want to feed new fluid into either the dipstcik tube or the lower hose and use the upper hose as your drain for the old fluid.
HTH,
BP
