Fitting a e90 m3 diff, in stock 135i subframe. What required?

[Rich196]

I have a bmw 135i 2008, n54, with a 6 speed manual transmission. I would like to fit an e90 m3 diff on to my stock 135i subframe.

I know so far that i need a e90 m3 DCT diff as it is closest to stock ratio.

I also know I need a custom prop shaft.

What I do not know is what is required for the half shafts, between the diff and hubs. Or anything else?

Can anyone help shed some light on this for me?

Thanks in advance.

[wanganstyle]

Originally Posted by Rich196

I have a bmw 135i 2008, n54, with a 6 speed manual transmission. I would like to fit an e90 m3 diff on to my stock 135i subframe.

I know so far that i need a e90 m3 DCT diff as it is closest to stock ratio.

I also know I need a custom prop shaft.

What I do not know is what is required for the half shafts, between the diff and hubs. Or anything else?

Can anyone help shed some light on this for me?

Thanks in advance.

Can you acquire a complete 1M rear subframe+ driveshaft? This will make your life much easier as the differential, axles, 1M driveshaft should just plug and play. Obviously not easy or cheap to find

the M3 has larger differential output stub axles than the non-M car; this may require the 1M hubs/CV shafts; 135 should be 84mm cv and M3 105mm or 96mm cv.

[ilikebmxbikes]

Originally Posted by wanganstyle

Can you acquire a complete 1M rear subframe+ driveshaft? This will make your life much easier as the differential, axles, 1M driveshaft should just plug and play. Obviously not easy or cheap to find

the M3 has larger differential output stub axles than the non-M car; this may require the 1M hubs/CV shafts; 135 should be 84mm cv and M3 105mm or 96mm cv.

+1

Get a complete m3 rear diff and front m3 knuckles. You can upgrade to m3 brakes while your at it. A 1m prop shaft is about $660 too so that is probably cheaper than a custom.