i had one in my old 4 door n/a, it has D 3 2, instead of D 2 1, if that makes sense. (so i figured it was)
(it was annoying doing a burnout cos id chuck it in 2nd being the lowest and it would spin up first, then change to 2nd once the revs got high enough and being a n/a it would just bog down and go fail.)
the thing is id count the gears and i could still only count 4 + the over drive :s weird.
i wouldnt really bother, my old auto box was shit house anyway.
although cruising at 110 with over drive on it would sit pretty low from memory compared to my manual. 2000-2500rpm lower ruffly
but yer thats all my experience with it..