If one or more drive wheels lose their adhesion and begin to spin, 4ets can replace the action of up to three conventional differential locks, depending on the situation and need.

Another thing gears do is adjust the direction of rotation. For instance, the differential of car has to turn power 90 degrees to apply it to the wheels.

And differential can not only deal with the problem above, but also play an important role in enhancing motor vehicle's steering performance and operating stability.