So far from various sources, nothing seems to say that your gearbox is instant history if you use Dextron II. Says some judder and some don't. So I guess if you want to take a punt on Dextron II then that is an option, if it judders, change it for T-IV.
Terry, are you saying that the people who are feeling a difference in their gearbox when using Dextron II are imagining it? If not, then there must be a difference between the ATF's. Yes/No?