What Does 4WD Auto Mean On A Truck Or SUV?

Some modern trucks and SUVs have a drivetrain mode called 4WD Auto. What does this mode actually do, and how does it work? Here's a quick rundown.
Cars

What’s the Difference Between AWD and 4WD?

When we talk about vehicles that can handle inclement weather or off-road use, many folks turn to cars with all-wheel drive (AWD) or four-wheel drive (4WD, or sometimes 4×4). AWD is a system or mode ...