I change the transmission fluid and filter every 50,000 miles. I use only OEM fluid. That's based on a long discussion with a transmission expert at a DFW repair shop that rebuilds and modifies BMW transmissions.
I change transfer case and diffs oil the same time I change trans fluid. I change the oil and filter at 5-6000 miles.
What is a lifetime to BMW? X years, X miles or X years and X miles?
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
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