Quote:
Originally Posted by 3PedalJake
On my '06 330i I swapped the 3.15 diff for a 3.64 from a 330i automatic and it feels just about right IMO. It's a direct swap, no other changes needed it bolts up to the driveshaft. Plenty more perceived torque, highway passing is easy without downshifting but not so much of an change to make it feel buzzy or high strung
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Thanks for sharing,
The 3.64 might suit my intentions perfectly.
I'm looking at this spreadsheet, trying to determine if it translates to the E90.
http://diffsonline.com/images/GearingCalculator.xls