The DT gear diff is a very nice unit. I have it in my XXX-CR. What you need to make it fit in the XXX-CR buggy is just the DT tranny case. Then you need to drill the screw holes, or just buy the longer DT tranny case screws. I run mine with Mugen 2000 wt oil on loose and loamy Swedish tracks. Works really good, no leaking at all. It doesn't feel "notchy" either. The weight of the whole unit is about the same as the ball diff.
