Max IV transmission oil change

[Colorado Al]

I just bought a used Max IV and want to be sure that the oils are good. When I looked at draining the transmission I can only see 2 plugs. One for the level and the other to add oil to. What is the best way to drain out old fluid? Do I need to remove trans or should I try sucking old out? Would appreciate direction on easiest way to accomplish this task.
Thanks
Colorado Al

[thebuggyman1]

Do you have a winch? This method works well, but is somewhat messy.
The auto-trak fluid is what I've been using and works well. It seems to eliminate the strange noises a t-20 can make. It's worth the $9 a qt.

[Bud]

A suction pump extractor works fine. There is no need to remove the transmission.