So with 103,000 miles on the Jeep, I'm getting the feeling the previous owners most likely never changed the Transfer Case Oil. After some time and a lot of Liquid Wrench I was able to crack free the Drain plug on the T-Case, but wound up completely stripping the inside hex on the upper fill bolt, it was everything I had in my weaker left arm but it didn't even budge at all, it was completely rusted and just spun and stripped inside. So, now faced with a problem like this on a hex bolt with nothing to grab onto, is there any hope I'll ever get that bolt out? PS: (I tore my right bicep tendon off the bone and had it surgically re-attached just a few month's ago, so I was using my weaker left arm to prevent a re-injury to my right arm, and still killed this hex bolt).