I don't know, maybe you can.
I haven't had to yet. With 4x4 and an auto locker in the rear, and front locked I haven't had any need to. If I get stuck with everything locked up, rocking back and forth is probably just going to break something anyway.

With your aussie in front, locked elocker in 4x4, you aren't going to get stuck until you are sitting on the frame or axles in deep mud/snow most likely. By that time, its going to take a lot of power to get all four wheels digging when you're locked up, might as well call a friend with a strap. lol

Then again if you've driven an autolocker and manual trans and didn't mind it, you know what you're in for. If you haven't noticed by now, I generally just confuse people more when I think out loud and talk about the downsides of each setup. haha

I went back and forth a LOT trying to decide what to do on my f150. But autolocker front and selectable rear was never an option. I despise driving an open rear diff, won't do it. I'll run a limited slip before I'll run a selectable locker that reverts to open. But I also wouldn't run a rear limited slip without a real locker up front. I ran the Aussie up front and it was cool, but less than ideal in snow. I really like my setup now but I wish the Detroit was a little smoother like my Aussie was.

 

ya i think im just gonna get eht detroit....i know its tough and im not worried about the drive...but that whole thing with the elocker unlocking and re-locking is no-go for me....ive had multiple times in mud and snow when i go forwards and then back and forwards again and i dont want to worry about breaking the locker....plus with the 8.8 it has pins instead of the collar type and i have read tons of bad reviews about the pins rounding off....so screw it go with what is proven to be tough and sacrifice a little ride quality....