Normally I'm not one to tell people to check other posts for questions that have been answer about twenty times, but I answered this question like 10 post ago. It is actually still on this group of post. You wouldn't have had to even go to a different page. Here is the link to that post
Tranny Question
Also had you done a search for the words "tranny fluid" I'm sure you would have come across a dozen or so posts telling you how to change your tranny fluid. Not trying to be rude, just lettin ya know.