Transfer case won't stay in 2H it keeps falling into neutral
 

For some reason my transfer case lever has a lot of play in it when in 2H, and easily falls into neutral even when driving down the road or taking off. It has done it a few times in the past year or so, but since putting my new clutch in it has gotten worse. I was just dealing with it, but the other day I was trying to back up a gooseneck and my truck was bouncing all over the place. I put it in 4H and it stopped. And no its not my clutch causing it, I have back several large loads with it already and it has never done that. It almost feels like it is falling in and out of 2H anytime I let out of the clutch. Any thoughts?