You can go that route and get the same lame fluid that you have in there now that is shifting harshly (remember, after only how many miles?) For $3.67 a quart at Walmart you can get Maxlife ATF that is recommended for both DexIII applications or T-IV, And I would venture to say that it is better fluid than the overpriced oem Toyota fluid.
Let us know how it does for you.
Let us know how it does for you.