Quote: Originally Posted by cali-ti it *might* be too big a change in ratio. keep in mind the m-coupe had a good deal more power to push a lower ratio diff. i guess it really depends on what you're after. | 3.15 is the stock M3 rear ratio. Since the transmission ratios are the same between the ZF and Getrag, how could this be bad? You're basically replicating the performance of a stock M3. __________________ SOLD!!! 1999 332ti //M Sport Titanium Silver M3 S52 3.2 I-6 Engine, M3 Clutch w/ ti Getrag Trans, Z3 3.15 LSD medium case diff and half shafts, OEM Hatch Spoiler, Eurosport HP Underdrive Pulleys, FDM, 17" DS1 rims, M3 Front Struts & Springs, M3 Instrument Cluster, 3-spoke //M steering wheel with tri-color stitching, SSK, CCFL Angels in Depo projectors with 5k HIDs |