Re grease...

I have done tons of vehicles (Honda Odyssey van, Volvo S70, XC90 etc. etc.), the grease is the same for outer and inner.

The Volvo uses the same supplier GKN-Lobro as BMW X5. The Volvo tripod design is similar to BMW X5 with needle bearings etc. Anyway, the X5 is unique lol...probably overkilled engineering...

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT