Originally Posted by GeorgeSmooth
The Manual diff is 3.85 .
So the 335i 6AT OEM diff is 3.46 FD
M3 dct is 3.15 FD
M3 mt is 3.85 FD
So in fact they are both +/- 0.30 FD difference
Based on the fact I'm running more power going longer must be the better option
As for the 335i MT diff it's 3.08 FD therefore the M3 DCT diff is the clear choice because the M3 manual 3.85 FD thats going to shorten the gearing significantly. Imagine that with slick drag rear wheels