Ford 2010 Explorer Owner's Manual page 297

Four–wheel drive (4WD) supplies power to all four wheels. Do not use
4X4 High or 4X4 Low on dry, hard surfaced roads. Doing so will produce
excessive noise, increase tire wear and may damage drive components.
4X4 High and 4X4 Low are only intended for consistently slippery or
loose surfaces. The use of 4X4 High or 4X4 Low on these surfaces may
produce some noise, such as occasional clunks, but will not damage the
drive system.
If equipped with the Electronic Shift 4WD System, and 4WD Low
is selected while the vehicle is moving above 3 mph (5 km/h), the
4WD system will not engage. This is normal and should be no
reason for concern. Refer to Shifting to/from 4WD Low for proper
operation.
System indicator lights
• 4X4 - momentarily illuminates
when the vehicle is started.
Illuminates when 4X4 HIGH
(4WD High) is selected.
• 4X4 LOW – momentarily
illuminates when the vehicle is
started. Illuminates when 4X4
LOW (4WD Low) is selected.
Using the Control Trac 4WD system
4X4 AUTO - Provides
electronically-controlled four-wheel
drive with power delivered to all
four wheels as required for traction.
This mode is acceptable for all
on-road driving but recommended
when wet pavement, snow, or loose gravel conditions are expected.
4X4 HIGH (4WD High) - Provides locked four-wheel drive power to all
four wheels. This mode is not intended for use on dry pavement. This
mode is appropriate for severe winter and off-road conditions, such as
deep snow, ice or shallow sand.
4X4 LOW (4WD Low) - Provides locked four-wheel drive power when
extra power at reduced speeds is required. This mode is not
recommended for use on dry pavement. Use this mode for off-road,
low-speed operation or when extra power is required, such as climbing
steep grades, going through deep sand, or pulling a boat out of the
water.
2010 Explorer (exp)
Owners Guide, 2nd Printing
USA (fus)
Driving
4x4
4x4
LOW
297