Seems like a lot of trouble to drop the engine rpm from 3000 to 2650.
If you liked your 318 and 325, you should be happy with the power of the 3.0 in the X5 (I had a 318i once as well, and an X5 3.0). Motordavid has an X5 with a manual, and can comment on his experiences on long highway trips. Yes, it revs a little high, but changing two differentials over just sounds like more trouble than it is worth.
Wouldn't it be easier to figure out if a six speed transmission would fit into it, and still work with the standard transfer case?
For background info, here is a similar thread with pricing for the swap: http://www.xoutpost.com/bmw-sav-foru...ive-ratio.html
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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