Crazy thought, it the axle locked when vacuum is applied or released. I wonder if it would be possible to extend the line into the cab and be able to turn it on and off from there. The reason is to be able to run an aussie locker in the front and be able to have it drive the left side while the right is unlocked for snow driving. I wonder if this would work to make it not so dangerous for street driving in winter. If it would work then a locker in the rear and front would make it a 3 wheel drive, instead of the stock 2 wheel drive it is now with open diffs (on snow and greasy roads) in 4x4. If I understand correctly. My reasoning for 3 wheel drive is as follows: on mud or snow, in 2H open diff it has 1 wheel spinning, 2H LSD is 1 1/2 wheels spinning, 4H open 2 wheels spinning(1 frt 1 rear),4H locker in rear 3 wheels spinning, 4H locker frt and rear 4 wheels spinning.( my way of barney level explaining the difference to my kids) Only 4H both locked is supposed to be bad for steering on road but great off road. Trying to find the best of both worlds. Or, am I just nuts??