Quote:
Originally Posted by AutoTechnique
I don't think the M1 shaft will be close enough, considering the M1 is based on a different platform the other 1 series. It would have to be modded, and chances are you will have to mod where the bearing carrier is. Keeping your original shaft would not entail moving the center bearing, just modding the rear part to fit the M3 or 5/7 series shaft.
Below, you can see the part numbers for the 135 and M3 driveshafts. You can also see their lengths.
135i Man = 1371mm, Auto = 1373mm
M3 Man = 1441mm, DCT = 1456mm
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I see what you're saying, It would be easier to cut the donor M3 shaft to mate w/ the E82 shaft, however, I was under the impression that the 1M uses the same 6sp mt as the 135...but uses the M3 rear subframe and diff. My goal is to use the diff from a M3 DCT/1M (gearing 3.18ish). If none are available used, I will source it from my local dealer.
To the OP...Not trying to
I am just trying to get some facts and details for doing this mod in the 135. Maybe one day this will be a sticky.