Transfer case not mounted to frame?

So Well I was under my truck changing the fluid in my transfer case I noticed that it was not mounted to the frame. it looks like there is suppose to be 4 bolts that hold it in place but those holes dont match up. Wondering if this could be why my truck has a harsh engagement from reverse to drive? I was thinking about trying to put a couple u bolts on it to keep it in place, so im really wondering is my transfer case suppose to not be mounted, or did the last person who tinkered with the transfer case just half ass his job?

(arrow in the photo is pointing to under the transfer case where it is not bolted to the frame.)

 

That definitely doesn't look right. Looks like your bushing is pretty beat up as well...

 

cant tell if that dirt or oil on the transfer case if its oil looks like you have a leak somewhere also..

 

Thank You! Now I just need to know what size bolts those 4 are.