4A vs 4H
You might be using 4WD wrong.
Automatic 4WD. The truck sends power to the front only when it detects slip, so it's safe on mixed roads: dry one minute, icy the next.
Locked 4WD. Great for snow, gravel and mud, but on dry pavement it binds up the drivetrain, especially in turns.
Not every F-150 has 4A. If yours only shows 2H / 4H / 4L, use 2H on clear roads and 4H when it's actually slick.


