Well, the T-case (possibly the rear end, not the gears I know) has been making this loud single pop up around crauising speeds. Nothing consistant. When I went through it, The 241, I found the shift fork teflon pads had come off and were floating around in the fluid. Which very well could have been the problem. So I got new ones, rebuilt the case. Couple days later Wham!! Same thing. Almost feels like its jumping outta gear and right back in. So they may have come off again or possibly the range fork is bent or something. I drove it to work today in 4hi with the front shaft out and it still did it, so Im not thinking a shifter adjustment would help. Any ideas folks? One more note: Its not the Transmission and its not the Ring and Pinion! These things I know.