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      11-30-2012, 01:13 AM   #11

stratplaya06's Avatar
Drives: 2008 E92 335xi
Join Date: May 2008
Location: Maryland

Posts: 886
iTrader: (7)

do NOT use gear oil in the transfer case. The fluid that these units take is sold by the dealer in 1L bottles (you'll only need one) and it contains special friction modifiers that smooth out the clutchpack engagement. It's not cheap at about $50-60 per bottle, but using any other fluid could cause some issues.

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