for about a month and just put it in 4WD for the first time and had a couple of issues. The jeep likes to stall (which I'm hoping some Sea Foam will help) but when I put it in 4WD it wanted to stall a lot more. Common Issue? ( I have manual transmission) I also had some issues shifting gears. The gears would grind like I was trying to shift without disengaging the clutch. (haven't had the problem in 2wd) Only way I could get it to shift was to put a descent amount of umph! into it. What could be the issue? And the last thing I noticed was that the 4wd shifter didnt want to get back into 2hi very easy either. My buddy had to push it with his foot to get it to stay up. I've never had a vehicle like this but it seems like that shifter is too loose. By that I mean it doesnt feel like it grabs anything like when you shift gears. Suppose to be like that?