I actually have that issue to Turbo. I bought it just for that article.
The first time I swapped the tranny fluid, I used Mobil 1. HUGE improvement in smoothness. Then I blew up the tranny.
Not that the two are connected.
I am going to change it again next month, and I'm trying to track down some NEO Synthetic. If it's good for the WRC car, it's good for mine.