Hi!
I have had the known "pump rub"-problem on my transfer case, and when I was under the truck I found a tube above the transfer case that was open in this end, and I cant find any place it would fit so I need to know if this is right or something is wrong here....

 

if the other end at tached to a tube on the tcase...its the t case vent and that is normal. it vents to atm osphere.
there are case repair kits so you don't have to replace the case. brny is the one i used. here is the part. i have not bought from this vendor.
482460 BRNY - NP136 NP236 NP246 NP261 NP263 Transfer Case Oil Pump Case Saver Plate (transpartswarehouse.com)

 

Hmmm, I tried to see where it came from, and it looked like it came from the front, either the trans or the engine, but I had to pick up my younger son so I didn't have time to check further, and I'm not sure I can see/feel where it comes from from the underside, maybe if I can get a camera or so I might see better...

 

the trans vent tube may also come out at that point