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Re: Changing gear ratio (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Bob Berry on May 20, 2001 at 12:41:01:

In Reply to: Changing gear ratio posted by Rob Welch on May 20, 2001 at 10:41:16:


I have a 1984 Euro 635csi. The gear ratio is 3.07.(for the autobahn, I guess). My mechanic has suggested a 3.91:1 diff. Any comments on whether this is too aggressive? Any downside to such a large change? (I want the quicker top end speed, but I don't want to give up much in terms of drivability.) Would a switch to 3.73:1 be better. Also, what is the best source for a replacement diff? Thanks. Rob.


Whats your tire size? It makes all the differance.

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