The valve body can be removed without dropping the trans. Take off the pan and you'll see the valve body (the filter is attached to the bottom of the valve body). I think there are 4 10mm bolts that hold the valve body on. I don't remember it being mechanically difficult, just nerve racking (I hate tranny issues). If you do remove it, be carefull reinstalling it. If I recall correctly (it's been 2+ years), one bolt is a different lenght. They are also easy to overtighten and strip.

Todd