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Old 12-30-2012, 10:16 PM
Tkaczuk's Avatar
Tkaczuk Tkaczuk is offline
1 John 1:9
Location: Amish Country
 
Join Date: Aug 2011
Posts: 652
Mein Auto: E30, Rabbit GTI
Quote:
Originally Posted by _Ethrty-Andy_ View Post
there will be no change in mileage unless doing very high mileage at freeway speeds, because the vehicle will have to work harder to get it moving in the first place. will be worse around town.

remember, BMW didn't just slap any old diff in there because it fits, each diff is selected specifically for that vehicle depending on engine size, transmission, body shape and if it has the towing package. there are roughly 10 different diffs for every BMW chassis in this era
Okay, so maybe not a 2.93.

I think it could make a good difference. The 2.93 in my swapped E30 was low on the power band but got much better mileage while the 4.10 could pull down a house and had crappy'er mileage.

Best bet, buy a 86-86 325e or es.
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