Quote:
Originally Posted by JCL
Which part isn't clear? Anything beyond approximately 3" [EDIT - 3%] difference in rolling diameter front/rear stresses the transfer case and risks damage. With a pre-2004 X5 solid transfer case that shows up in problems with the splines. With an x-drive transfer case in either an X3 or X5 that shows up in wear to the clutch packs. Different manufacturers of tires have variations in actual rolling diameter, which is why many tire stores will want to replace your tires four at a time, not two at a time, so you don't come back and blame them if you have problems with a transfer case later.
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I understand the difference in tire diameter can and will impose stresses on the transfer case internals, but the post in which I am questioning is that the front and rear tires were the proper size tires. If the manufacture of these tires produces the front and rear tires a 1/2 inch bigger respectively, then the OEM size, there should be no stress on the transfer case. Based on the thread to which I replied WHAT?, the question remains.