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It has been discussed that the driveshaft of 340i/440i xDrive is the same as the RWD versions.... which is good. However, I just learned that the rear differential is different! The one in the xDrive versions is used also on 330i/430i RWD.... suggesting it is not as strong as the one used in 340i/440i RWD cars, which is only used on those engines (with RWD).
Hence xDelete is putting quite some extra stress on the rear differential... which is NOT identical with the rear differential on RWD cars!
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"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
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