Aussie locker is Automatic?
Yes, and in an AWD land cruiser, almost unnoticeable aside from some clicking once in a while. I grew up in northern Michigan and would not want one in a rear driven part time 4wd vehicle, but in an 80 series it would be a no brainer. For the OP’s stated use, throwing selectable lockers in a rig would be almost pointless. A $300 automatic locker is more than enough.