Jeep goes in to 4wd high but falls out, not into 2wd, but just slightly toward neutral, but not all the way, just enough to no longer be in 4wd. I can feel some play in the shifter in the 4wd high area. Goes in to Neutral and 4wd low fine, and stays there. It's just the 4wd high. Anyone know what's wrong? Is there an adjustment I need to make to the stock shifter?