it will just dribble a few drops of trans fluid when you remove the plug.
hardly even need a rag for.

trans temps here should be 150 absolute bare minimum once up to temp.175 ideal trans temp.200 still safe,but the trans fluid would need to changed more often.installing an external trans cooler,and possibly playing with its mounting location can help you average the ideal 175 under normal operating conditions.

http://www.digi-panel.com/trannyoil.htm