Off-roading enthusiasts know that having a locking differential on your car

when going off the beaten track can make life a lot easier when the trail gets sketchy.

Some cars come equipped from the factory with locking diffs,

usually on the rear axle, but more hardcore models like the

Mercedes-Benz G-Class can be specced with up to three locking diffs.

So how do four of America’s electric pickup trucks compare when it comes to delivering power to the ground?