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Old 01-17-2014, 02:28 AM
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Quote:
Originally Posted by INDe53 View Post
I can't say for certain about the 330XI, but the 325XI that we have has a NV124 transfer case and the attachment points look to be different then the NV125. I don't know if the NV 124 case would hold up to the demands of an E53 vs the E46 for which it was intended. Even if it would, you would probably have to relocate your support mount and modify front and rear prop shafts to the new lengths. A lot of work to change fly wheels.
Or, the difference could be made up if the transmission rear housing case could be modified to bolt up to a S5D 320Z (E46 manual) off of a S5D 280Z (E53 manual). Of course the only benefit of that would be if the length of both transmissions were the same that way you could keep the NV125 and current prop shafts.
These examples are based on and early E53, if you have a late model the transmission maybe different.
We had a 325xi. I understood that the NV124 and NV125 were essentially the same transfer case, except that the 125 has a chain drive instead of a gear drive. That has to do with the greater offset to the front driveshaft (higher vehicle). That makes them not interchangeable. If BMW had been able to make the front driveshaft work on the E53 with the NV124, they wouldn't have needed to develop the NV125.
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