Beta Automatic 4WD Transfercase & Locking Differential 1.0

Discussion Thread.
The automatic locker mod is somewhat based on certain American 80's~90's pickups/SUVs. The automatic locking differentials only have two "modes": open and locked. As shown

The diff is purely mechanical, no g-sensor no throttle or connections to ECU. It has a centrifugally engaged rachet-sort of thing.
In open this differential behaves exactly the same as any other open diff or locking diff in open mode. When the input torque is positive and the wheelspeed difference between two output shaft exceeds 100RPM, it'll lock. When in Locked mode the differential is 100% locked(not an LSD), the two wheels spin at the exact same speed. After that it can't determine when to unlock since the wheelspeed are always the same when locked. To unlock it, simply lift the accelerator or stop and wait, when the input torque is gone or the vehicle is stopped for a few seconds, the diff unlocks.
For on-road driving, this diff works OK as it stays open when driving on good traction surface. On snow and ice, it locks right after wheelspin, faster than most if not all traction control. Since you won't be using high throttle when driving on slippery surface, the diff will unlock very quickly when you reduce throttle after getting unstuck. Spirited driving on streets is not recommended as the diff may lock immediately once the inner wheel slips in a high-g turn, leading to a sudden oversteer.
For off-road driving, this diff works great in most situations, the locking is not smooth but very effective. On dirt or mud it's as effective as a locked differential, expectantly useful when climbing steep inclines. However, this diff is not very good at rock crawling. In rock crawling the vehicle is traveling much slower than the diff lock wheelspeed threshold, the diff may suddenly unlock when the vehicle is stopped in the middle of a crawl and the wheels may spin in the opposite direction because of open differential action, which leads to rolling backwards.
The automatic 4x4 is also very simple, since most if not all off-road trucks/SUVs are RWD when in 2WD, and when cornering, the front axle spins faster than the rear axle, this can be used as a "freewheel" to unlock the transfercase to 2WD to prevent driveline windup(axle binding). If the rear axle spins faster than the front axle, the wheel is slipping, engage 4WD. When in 4WD and the front axle output torque is negative, the 4WD disengages right before axle binding.

Vehicles supported:
Gavril D-Series
Gavril H-Series
Gavril T-Series(only diffs, not transfercase)
Gavril Roamer
Ibishu Hopper

To use the active lockers, select them in the vehicle parts menu.