Sorry, the base does not include limited-slip or locking differentials. They are "open differentials" meaning that the front wheel with least traction and rear wheel with least traction will turn. HOWEVER, there is some computer assist to apply brakes to the spinning wheels and approximate the effect of a limited-slip in some circumstances.I was under the impression that the base 4x4 would have front and rear t-loks or equivalent (automatic mechanical locking of both axles when slippage occurs on the powered wheels).
Please, please don't feel me that a base 4x4 only has one wheel driven in the rear and one in the front? That wouldn't be "4"x"4".
Sasquatch will provide full locking differentials, which ensure that 1, 2, 3, or 4 wheels are driven based on the settings. But they disengage above ~20mph so they are for low-speed trail use, not high-speed offroad.
For the Raptor-ized Bronco in development, it likely will have a limited-slip in the front and e-locker in the rear for better high-speed offroad and street performance. With this setup, you apply brakes and throttle simultaneously in situations when full front traction is desired.