Member
First time owning a xi. Had it in to my trusty local shop and they suggested changing the transfer case fluid. I agreed, and they did. FWIW, they drained and filled twice to clean it out (which does make sense).
The car now seems to drive better - it seems like there's better synchronization, for lack of a better word, between the front and rear drive. It just feels smoother (even though I need to replace the rear diff bushing). And as the British might say, the difference is not subtle - it's easy to tell.
Does the above make sense? Car has 176K; not sure it had ever been done before.
Member
I changed mine at 125K and noticed no difference, just cleaner oil in there, it is after all only about 5 oz.
Gave away my BMWs, driving a VW and an Audi now.
Member
I've changed it in my jeeps but I didn't notice a difference. But depending on how dirty your fluid was, I guess it's plausible.
You heel-toe, I'll toe-floor.
Member
The BMW engineers say that fluid will last a lifetime.
Member
Originally Posted by DavisJr
'lifetime' is 100k km or 60k miles
Current:
- 09 335i MSport, FBO.
- 98 Euro M3, Estoril Blue
- 04 M3, Carbon Black, 6 Speed Coupe
- 06 M5, Black on Black, Full Leather.
- 73 3.0CS, Tagia Green, 5 speed M30b35 converted
Ex's: 1984 325e, 1988 325IX, 1992 525I, 1995 540i/6, 2002 330i, 2005 330xi, 1992 850i, 2003 330i #1, 2003 330i #2, 2002 330ci, 2004 330ci, 2007 328CI, 2007 335i, 2001 M3, 2006 M5 6 speed
Member
BMW speak: "Lifetime fluid" = the lifetime of the tranny/differential/transfer case!!!
Member
Well it might not be replaceable but fluids gets burned and dirty with time, mines 100k and it feels great but i still have my doubts
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