FOUR-WHEEL DRIVE
LIMITATIONS
Do not use four-wheel drive high or
four-wheel drive low mode on dry, hard
surfaced roads. Doing so can produce
excessive noise, increase tire wear and can
damage driveline components. Four-wheel
drive high or four-wheel drive low mode is
only for use on consistently slippery or
loose surfaces. Use of four-wheel drive low
mode on these surfaces could produce
some noise, such as occasional clunks, but
should not damage driveline components.
For vehicles with an electronic
shift-on-the-fly transfer case, the driveline
could become mechanically blocked when
attempting to shift out of a four-wheel
drive mode on dry, hard surfaced roads.
Note: When your vehicle comes with the
4x4 part-time selectable engagement
transfer case and you are transitioning from
consistently loose or slippery surfaces, be
sure the four-wheel drive system is not
mechanically blocked once you are on dry,
hard surfaced roads in two-wheel drive high.
Note: In certain scenarios, where the
four-wheel drive system has difficulty
engaging, a To Engage 4x4 Slow to 3 MPH
or To Engage 4x4 Slow to 5 km/h
message could appear in the instrument
cluster. You can also see this message
when engaging the four-wheel drive system
in extreme cold climates at the beginning
of the drive cycle. Once the driveline warms
up, shifting to four-wheel drive can resume
as normal.
Operating Four-Wheel Drive with
a Spare or Mismatched Tires
On four-wheel drive vehicles, the size of
the spare tire can affect the four-wheel
drive system.
If there is a significant difference between
the size of the spare tire and the remaining
tires, you could have limited four-wheel
drive functionality, added noise, discomfort
and driveline damage.
Due to normal tire wear, your spare tire is
not necessarily the same size as your
on-road tires, which makes your spare tire
a dissimilar size. Use the spare tire on a
limited basis only.
When driving with a dissimilar wheel and
tire assembly do not:
• Exceed 50 mph (80 km/h) when
operating in a four-wheel drive mode.
• Select a four-wheel drive mode unless
the vehicle is stationary.
• Use a four-wheel drive mode on dry
pavement.
You could have limited four-wheel drive
functionality when driving with a dissimilar
wheel and tire assembly, especially when
driving in a mechanically locked four-wheel
drive mode. You can experience the
following:
• Additional noise from the transfer case
or other drive components.
• Difficulty shifting in and out of a
mechanically locked four-wheel drive
mode.
• Driveline component damage.
Mechanical Shift Blocking
On vehicles with an electronic
shift-on-the-fly transfer case, the transfer
case distributes torque to the front wheels
by mechanically interlocking the front and
rear driveshafts together. Various external
factors can affect shifting performance of
this type of system including, but not
limited to:
• Vehicle acceleration.
• Dissimilar tire sizes.
• High steering input.
183
2022 Bronco (TG1) Canada/United States of America, enUSA, Edition date: 202109, First-Printing
Four-Wheel Drive
To Next Page
Loading...
