My grizzly definitely has more backlash than both the trutrac and the factory carriers that preceded it.
Again, im a total noob to locked diffs..but I have to say after hearing the opinion of the guys at MC and on this board, I'm equal parts relieved and disappointed. The drive behavior (mainly the throttle) feels so sloppy now. It felt like it was marketed to be a much tighter and seamless system than I'm experiencing IMO.
Alongside the overhaul of the rear end, I also dropped a fully trussed & refreshed front end with an aussie locker. Didn't occur to me until today I could compare the two....with hubs locked in neutral the Aussie has just about as much play. Though in 4wd the thing hardly makes any noise. Especially in comparison to the grizz. Lesson learned, I guess.