Simultaneous Brake And Throttle Operation; Driving In Snow, Mud And Sand - Jeep 2010 Wrangler Owner's Manual

JOBNAME: CHRY OM INTL (Conten PAGE: 194 SESS: 2 OUTPUT: Wed Aug 25 08:13:16 2010 SUM: 4D4E0A08
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Simultaneous Brake And Throttle
Operation
Many off-road driving conditions require the
simultaneous use of the brake and throttle
(two-footed driving). When climbing rocks,
logs, or other stepped objects, using light
brake pressure with light throttle will keep the
vehicle from jerking or lurching. This technique
is also used when you need to stop and restart
a vehicle on a steep incline.

Driving In Snow, Mud And Sand

Snow
In heavy snow or for additional control and
traction at slower speeds, shift the transmission
into a low gear and the transfer case into 4L
(Low) if necessary. Do not shift to a lower gear
than necessary to maintain headway. Over-
revving the engine can spin the wheels and
traction will be lost. If you start to slow to a stop,
try turning your steering wheel no more than a
1/4 turn quickly back and forth, while still ap-
plying throttle. This will allow the tires to get a
fresh bite and help maintain your momentum.
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CAUTION!
On icy or slippery roads, do not downshift at
high engine RPM or vehicle speeds, because
engine braking may cause skidding and loss
of control.
Mud
Deep mud creates a great deal of suction
around the tires and is very difficult to get
through. You should use second gear (manual
transmission), or DRIVE (automatic transmis-
sion), with the transfer case in the 4L (Low)
position to maintain your momentum. If you
start to slow to a stop, try turning your steering
wheel no more than a 1/4 turn quickly back and
forth for additional traction. Mud holes pose an
increased threat of vehicle damage and getting
stuck. They are normally full of debris from
previous vehicles getting stuck. As a good
practice before entering any mud hole, get out
and determine how deep it is, if there are any
hidden obstacles and if the vehicle can be
safely recovered if stuck.
Sand
Soft sand is very difficult to travel through with
full tire pressure. When crossing soft, sandy
spots in a trail, maintain your vehicle's momen-
tum and do not stop. The key to driving in soft
sand is using the appropriate tire pressure,
accelerating slowly, avoiding abrupt maneu-
vers and maintaining the vehicle's momentum.
If you are going to be driving on large soft
sandy areas or dunes, reduce your tire pres-
sure to a minimum of 15 psi (103 kPa) to allow
for a greater tire surface area. Reduced tire
pressure will drastically improve your traction
and handling while driving on the soft sand, but
you must return the tires to normal air pressure
before driving on pavement or other hard sur-
faces. Be sure you have a way to reinflate the
tires prior to reducing the pressure.
CAUTION!
Reduced tire pressures may cause tire un-
seating and total loss of air pressure. To
reduce the risk of tire unseating, while at a
reduced tire pressure, reduce your speed and
avoid sharp turns or abrupt maneuvers.