That's a good question, but becuase I wanted their torque biasing center diff. for the LT230, I ended up getting an Ashcroft.
Good to see another ATB enthusiast.
Quaife makes one, as well. I've been wanting to pick that up for a while to match the front and rear differentials, but that's an expensive installation that may as well include a few modifications and a full rebuild at the same time; and right now I've still got some other issues to chase.
The Ashcroft units are commissioned Asian copies of the Quaife, but they're supposed to be as close to identical as possible. These vehicles are absolute
monsters with ATBs fitted. 90% of a locker 100% of the time, and you can get that 10% back with your left foot or a lack of Amigos.
Rock-hopping enthusiasts will do better with a locker, as they've typically built the vehicle specifically for that purpose, but for many
genuine overland purposes, the vast majority of trails, and on the road, ATBs are the cat's ass; and there's nothing extra to maintain or break.
Just lube them like a factory unit and forget the things. I'm sure it happens, but I've never personally observed one breaking or becoming "worn out".
For those unfamiliar with these devices, they're kind of like a balls-deep, "Super Trutrac". I'm excited to get that center in there some day, as I've driven vehicles equipped with three, and it's very nice. The fact that you can still lock the center differential if you ever need to is a nice cherry on top.
Cheers,
Kennith