Obviously I will be in camp roasting dinner of my choice while you are stuck and drawing pictures.How a lunchbox type locker allows differentation: The pinion gear turns the ring gear which turns the carrier... The carrier pin turns with the carrier and turns the 2 halves of the lunchbox locker which lock into the side gears...The carrier pin pressing against these 2 halves forces them apart to lock into the side gears. When your outside wheel begins to turn faster than the inside wheel in a turn the half of the locker will move faster than the pin slightly and unlock from the side gear and "ratchet ahead sliding over the locking lugs". As soon as it is getting force from the carrier pin it will lock back in..........The lunchbox type will never allow either wheel to spin slower than the gear ratio. It will allow the outside wheel to turn faster....This is the differentation that gives you better steerability than an air, electric, or cable locker when locked. When you turn on slick terrain with a manual locker the outside wheel acts as a brake working against your turning the vehicle.
Detroit and lunchbox type is called a locker because it will not allow a wheel to slip or spin slower than driven. It will allow to ratchet ahead faster.