theres two plugs on one of the sides of the tranny (cant remember), bottom one drains, top one fills. youll have to check to see what tranny you have since some take different fluid. theres a tag near the front that has the info.
once you got the fluid and drained out the old, put the bottom plug in and fill the top one until fluid starts coming out. then put upper plug in and your done
I know a lot about cars. I can look at a car's headlights and tell you exactly which way it's coming