I was greasing my rear u-joints last night, nursing them along until Monday when I'm changing them, and I noticed that the bottom of the body tub above the t-case output was wet & oily-looking. A closer look showed that the output yoke is wet with (I think...) ATF. BUT, it's ONLY the yoke that's wet, not the portion of the shaft that passes thru the lip seal at the end of the housing. The lip seal is dry as well. It's a slow leak; the fluid level is still good. My question: Is it possible for fluid to make its way, internally, thru the shaft and yoke and out of the case? Is there a seal somewhere that's going bad? Do I need a new output yoke? Do I (gulp..) need a new t-case? I really need some guidance on this. I'm tearing into the u-joints on Monday, so if there's other stuff that needs replaced, I'd like to be able to get parts and figure out a game plan. Thanks in advance for your help! Semper Maintenance!