I have only wheeled with my D30 Aussie once, but here is what I noticed:
1. The YJ will now climb straight up a wall
2. The turning radius is increased. As I got used to the feel, this was less of an issue, but the first couple turns were a learning experience.
3. In 2wd I don't even know it is there.
4. Easy to install, but it does require pulling the carrier, unlike the 8.8.
Are you running Chromo shafts?
With the front locker, you will use less throttle, since the Jeep will climb better. Less throttle should mean less breakage.