Quote:
Originally Posted by Cyrix2k
I'd look at the GS6X37BZ/DZ gearbox (BMW part# 23007563053) used in the late e46 iXs. The e46 shares the same 5-speed trans with the X5 and never received X-drive, so there's a high likelihood your old transfer case will bolt up. The e46 used the same transfer case its whole production run as far as I can tell.
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This is a great thought. I just did some poking around on realoem, and it appears the e46 ix transfer case is more like the x5 lci atc500. It's a similar bolt pattern but doesn't look to be an exact match from what I can tell. I think the e46 is slightly different because of packaging (i.e the front driveshaft is more tucked in than on the e53). The pre lci x5 tranfer case (nv125) will definitely not bolt up to the e46 trans. Possibly, you could put the e46 transmission, front driveshaft and front diff in the e53, but the differential ratio would be different than any made for the e53.