But a virtual diff relies on software which can be fiddly, while a physical unit locks the two wheels of an axle together, making them rotate at the same speed. So how do four of America’s ...

Just as 4WD High locks the front and rear axles together, the rear diff lock connects the rear end side-to-side. That means ...

The so-called Full Self-Driving advanced driving assistance system (ADAS) didn’t work, and neither did the mechanical differential lockers. One of the headlining features was the ability to ...