another update. it's been 6 years and 100k miles since my first post in this thread (first page).
x5 4.4 now has 150k miles. I still have the original transmission filter! Ive been draining/filling the pan with penzoil mult atf (esso compatible) at every other oil change since 50k miles.
some observations: trans would hesitate shifting into first coming to a stop. I would change the fluid and problem would go away for months. issue will eventually resurface more and more frequently until I change the fluid again.
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