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differential swap
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  1. E63 / E64 6 Series (2004 - 2010)
    A couple weeks ago I took a trip on the 6er from Tempe, AZ. to the bay area stopping at three different beaches. On my way back home, just 40 miles before getting home, I noticed an intermediate clacking noise. I stopped my a gas station and gave it a visual inspection, and thought it was just...
  2. X5 E53 (1999 - 2006)
    Hello, has anyone changed the ring and pinion gears to get better mileage? My 02 X5 4.4i has plenty of power. Are there other gear ratios available that would reduce the RPM at cruising speeds? How about an overdrive trans for the X5, mine has the 5 Sp auto.
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