I should point out that the main difference between the X5 and a JC is that (at least my JGC and LR) the transfer case is lockable, vs the open Transfer Case on pre x-Drive X5's.

This particular transfer case is not designed to have a single output, as it will spin the open side twice as fast, if you somehow block off the FWD portion of the Transfer Case the Rear will spin twice as fast as normal, for example. That was my experience with mine anyway.

I'm not discouraging you because it will be interesting to see your results, have fun and let me know! It'll be neat to see you nailing some sweet ass drifts and smoke shows if you get it done! LOL.