I use the vts and it works great on a lose track outdoors. I did not try this c diff out. If it does work how does it work out side on lose tracks. the stock slipper did suck bad even over jumps. the vts works great on the jumps. If this cdiff works even better than the vts im gonna try it out and see why everybody argues over an opinion. or if it just the better part. I only got the vts cause that what I found first and it was in the upgrade kit. I did just find out it works for the 2wd so I might though it in there. can some send me a link to this cdiff so I can check it out. from what it sound like it locks up the slipper and im guessing it works really well on indoor tracks. but that is just what im getting from reading all this stuff so far. and it handles jump like crazy good.