Quote:
Originally Posted by kern417
The only difference between auto and manual is the ratio. This shouldn't do anything with axle fitment because it gets installed inside of your diff housing. It's not a complete unit like the MPerformance one.
MFactory said they haven't confirmed fitment on the 340i/440i but their website shows fitment for the 335i/435i that has the same differential. So that's why I'm asking.
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Sorry i meant the difference between E9x and F3x was supposedly axle-related, not the difference between auto and manual on F3x. But I get what you are saying, originally read your post as asking about the MPerformance units.