What's the typical final drive ratio used on the manual trans X5s, and how does it compare to those equipped with autos? The super-low first gear is a bit annoying at times, and I'm thinking of possibly swapping the diffs out with a set from an automatic, if that would give it slightly longer legs. Of course, doing that will only happen if I come across a front & rear diff that are decently priced.

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2001 X5 Sport 3.0/5-speed
1998 318ti/5-speed
1988 735i/5-speed
1984 528e/5-speed (soon to be M20B25-powered 525i!)