4x4 shifter

[Flooringit]

Ok this truck is new to me. So I'm trying to figure stuff out. Tdaybi used four wheel drive and when I put it back in 2 hi it keep kicking into nuetral then I finally got it to quit I've drive It several hundred miles but just did the 4x4 today. I know it had a new transfer case put in it. But I looked at the lever where it bolts to the transfer case and it looks like it's missing a washer or a spacer between bolt and transfer case. I've looked on line at all the oem sites but can't find that schamatic so I can figure out what it's missing. Anyone have one or does anyone k ow what they actually call it so I can look it up. I've tried 4x4 linkage, shifter even looked up transfer case but no pic for that just Serling the transfer case. Thanks

[Flooringit]

Well I loomed at a schematic looks like everything is there. Anyone have any ideas why it slips out of two hi it doesn't go into nuetral it just slips between two hi and four hi.