Meritor rear end

I have my semi jacked up all three drivers accept the right front spin the inter axel shaft my diff is disengaged the right front spins. Makes noise and tries to spin right rear ad interest axel shaft but can't? Any ideas

 

Rear end issue front passenger driver spins freely makes metallic clanking and attempts to spin the shaft between rear ends but can't all other drive wheels spin this shaft? What can the cause be

 

Both pumpkins or just front one and could it just be the spindel to that one corner or r u saying it's the read driver

 

So u say to pull the shaft between rear ends and look for what I'm fairly mechanical inclined but never done rear ends although not much scares Me

 

That was what I thought if it's shot u.suppose I can get away with replacing this one shaft the rest has more that normal slop buy I really don't wanna rebuild at this moment can't afford it or the down time