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you could also / or instead of changing your diff ratio , change your reduction gear ratio . marks has 43% and 85% and there was someone offering a 63% ratio that some think is the ideal compromise ratio between the 2 , on this and the other patrol forum . if you have 4.3 diffs already and put in say 63% ratio reduction gears in the transfere box , you would have excellent low range abilitys and still have the taller gearing for touring on road . cost wise after changing diffs as compared to changing transfere case gear i'm not sure about . but you would have the best of both worlds .