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Seriously though, i have the "same"question. Except on an f30. I have the m performance automatic 335 lsd 3.15 gears. My car is a manual 335 with an open 3.23.
Physically, this will work, but electronically I'm on the fence. The only problem i can see is if the speed sensor on the trans directly interacts with a wheel speed sensor. It may sense two different speeds and error. Oor is it a small enough difference that the different modules compensate?
I.e if the trans is saying 20mph but your wheel speed senor isnt spinning fast enough(or to fast if you went with shorter gears) ... what happens and is this how the DSC even interacts with the rest of the car? And could there be coding to eliminate a potential issue with using a diff with taller gears in it?
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