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Old 10-27-2012, 06:31 AM
anE934fun anE934fun is offline
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Location: S.F. Bay Area
 
Join Date: May 2008
Posts: 6,789
Mein Auto: 2010 335d
Quote:
Originally Posted by 62Lincoln View Post
GBD, I think you'll need to address the difference in final drive ratios. From the factory, the 335i is 3.462, and our d is 2.813. I don't know if Quaife varies final drives or not, but that would be the central issue, as I would assume the fitment would be the same. Can you contact Quaife directly?
The issue is with the different gear ratios between the 335i vs. 335d. Since the ring gear is welded on the 335d, there are two options - 1.) swap for a bolted 335i differential, or 2.) find a machine shop that can weld a new 2.81 ring gear to the quaiffe differential. If the 335i differential is swapped, fuel economy will suffer and you might have driveability issues. The best solution would be finding a shop that can weld the ring gear.
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