There are only three things that make your transfer case shift... First, think basic, is your switch any good, next there is the chance of a vaccum leak at the case( there is this stupid looking modulater) then the control module, which is also on the case is the most expensive item, and usually the problem. If I were you I would ditch that push button shit, and get yourself a case with some levers. You know they are making an Atlas II for the Rangers now!!!!!