Quote:
Originally Posted by cwickberg
Wow, seriously? You think changing a transmission on old cars to improve gas mileage is worth it?
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In general BMW spoke about the facelift upgrade as partly a mechanical upgrade of the transmission(among others. It was an upgrade as the got better mileage. Especially the AT saw improvements.
from Automobile-catalog it says:
Combined mileage
18d_______2011____2013
MT
Xdrive____17.5 km/l_18.2 km/l_1.3 km/l
Sdrive____19.2 km/l_20.4 km/l_1.2 km/l
__________1.8 km/l__2.2 km/l_2.9 km/l
AT
Xdrive____16.1 km/l_18.5 km/l_2.4 km/l
Sdrive____16.9 km/l_20.0 km/l_3.1 km/l
__________0.8 km/l__1.5 km/l_3.9 km/l
The improvement is significant on the AT, being 3.1 km/l for the Sdrive and 2.4 km/l for the Xdrive.
So clearly - the phase II transmission was a huge improvement for the resistance in the 4wd transmission.
I'm not saying that there might be a monetary saving in it.
But lets imagine that I could get my hands on a working transmission from a 2014 for almost no money. Would it fit inside a 2011 E84 - and thereby improving fuel economy?