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Old 07-25-2021, 02:03 PM
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bcredliner bcredliner is offline
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Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 8,105
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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?
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
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