Quote:
Originally Posted by Traf
That is what i'm using too, lenght for N54 is 1325mm, lenght for N55 is 1339mm, that being said, the shaft is adjustable on multiple point, so even with 1339mm it would work on a N54.
I know i've been running this setup for a year now, M3 diff is not that good, i'm switching to a ZF 45/45 soon.
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The M3 diff is of different dimension than our e82 diffs. A 1M uses an N54 with an N55 transmission so the 1M shaft is not bolt up on an N54 w/ N54 transmission. You need to make a custom shaft. With the measurement, it would be great to get a shaft made before doing the axel swap to save time. Versus doing the swap, measuring yourself and then having the shaft made like i did with my v8 swap.
Both n54/n55 use the same diff. The difference in shaft length is due to the transmission length.
N55 135I - 1385mm
N54 135I - 1373mm
Difference - N54 = 12mm Shorter
1M N54/N55 Trans - 1339MM
N54/N54 Trans / M3 DIFF is likely 1327mm but I want confirmation.