wheel torque DODGE NITRO 2008 1.G Owners Manual

TCS (Traction Control System)
This system monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) and engine
power is reduced to provide enhanced acceleration and
stability. A feature of the TCS system functions similar to
a limited slip differential and controls the wheel spin
across a driven axle. If one wheel on a driven axle is
spinning faster than the other, the system will apply the
brake of the spinning wheel. This will allow more engine
torque to be applied to the wheel that is not spinning.
This feature remains active even if TCS and ESP are in the
ªPartial Offº mode. Refer to ªESP (Electronic Stability
Program)º in this section.
BAS (Brake Assist System)
The BAS is designed to optimize the vehicle's braking
capability during emergency braking maneuvers. The
system detects an emergency braking situation by sens-
ing the rate and amount of brake application and then
applies optimum pressure to the brakes. This can help
reduce braking distances. The BAS complements the
anti-lock brake system (ABS). Applying the brakes very
quickly results in the best BAS assistance. To receive the
benefit of the system, you must apply continuous brak-
ing pressure during the stopping sequence. Do not
reduce brake pedal pressure unless braking is no longer
desired. Once the brake pedal is released, the BAS is
deactivated.
132 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

the transmission. This condition is normal and will not
cause damage to the transmission. The torque converter
will refill within five seconds of shifting from Park into
any other gear position.
FOUR-WHEEL DRIVE OPERATION
MP 143 Single-Speed Part-Time Transfer Case Ð
If Equipped
Operating Information/Precautions
This is an electric shift transfer case and is operated by
the 4WD Control Switch (Transfer Case Switch), which is
located on the center console.
This electronically shifted transfer case provides 2 mode
positions: 2 (rear) wheel drive high range (2WD) and 4
wheel drive high range (4WD LOCK).The electronically shifted transfer case is designed to be
driven in the 2 wheel drive position (2WD) for normal
street and highway conditions (dry hard surfaced roads).
When additional traction is required, the transfer case
4WD LOCK position can be used to lock the front and
rear driveshafts together and force the front and rear
Transfer Case Switch
STARTING AND OPERATING 265
5

you momentarily release the accelerator pedal after turn-
ing the control switch. If the vehicle is stopped, the
ignition key must be in the ON position with the engine
either RUNNING or OFF. This shift cannot be completed
if the key is in the ACC (Accessory) position.
NOTE:The 4 wheel drive system will not allow shifts
between 2WD/4WD LOCK if the front and/or rear
wheels are spinning (no traction). In this situation, the
ª4WDº Indicator Light (located in the display under the
tachometer) will flash. At this time, reduce speed and
stop spinning the wheels to complete the shift.
NOTE:Delayed shifting out of 4WD LOCK may be
experienced due to uneven tire wear, low tire pressure, or
excessive loading.MP 140 Single-Speed Full-Time Transfer Case Ð
If Equipped
Operating Information/Precautions
The MP 140 is a single speed (HI range only) transfer case
which provides convenient full-time all-wheel drive. No
driver interaction is required. This transfer case employs
an inter-axle differential that divides engine torque al-
most evenly with 48 percent torque to the front axle and
52 percent torque to the rear axle, this allows the front
and rear wheels to rotate at different speeds, on all road
surfaces. The Brake Traction Control System (BTC),
which combines standard ABS and Traction Control,
provides resistance to any wheel that is slipping to allow
additional torque transfer to wheels with traction.
STARTING AND OPERATING 267
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Remember, never drive diagonally across a hill-always
drive straight up or down.
If the wheels start to slip as you approach the crest of a
hill, ease off the accelerator and maintain headway by
turning the front wheels slowly left and right. This may
provide a fresh ªbiteº into the surface and will usually
provide traction to complete the climb.
Traction Downhill
Shift the transmission into a low gear and the transfer
case to 4L or 4LO range. Let the vehicle go slowly down
the hill with all four wheels turning against engine
compression drag. This will permit you to control the
vehicle speed and direction.
When descending mountains or hills, repeated braking
can cause brake fade with loss of braking control. Avoid
repeated heavy braking by downshifting the transmis-
sion whenever possible.
After Driving Off-Road
Off-road operation puts more stress on your vehicle than
does most on-road driving. After going off-road, it is
always a good idea to check for damage. That way you
can get any problems taken care of right away and have
your vehicle ready when you need it.
²Completely inspect the underbody of your vehicle.
Check tires, body structure, steering, suspension, and
exhaust system for damage.
²Check threaded fasteners for looseness, particularly on
the chassis, drivetrain components, steering, and sus-
pension. Retighten them, if required, and torque to the
values specified in the Service Manual.
²Check for accumulations of plants or brush. These
things could be a fire hazard. They might hide damage
to fuel lines, brake hoses, axle pinion seals, and
propeller shafts.
STARTING AND OPERATING 271
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9. Finish tightening the lug nuts. Push down on the
wrench while tightening for increased leverage. Alternate
nuts until each nut has been tightened twice. Correct
wheel nut tightness is 130 N´m (95 ft. lbs). If in doubt
about the correct tightness, have them checked with a
torque wrench by your authorized dealer or at a service
station.
10. Lower the jack to it's fully closed position.
WARNING!
A loose tire or jack, thrown forward in a collision or
hard stop could endanger the occupants of the ve-
hicle. Always stow the jack parts and the spare tire in
the places provided.
11. Secure the tire, jack, and tools in their proper loca-
tions.
JUMP STARTING
WARNING!
²Battery fluid is a corrosive acid solution; do not
allow battery fluid to contact eyes, skin or cloth-
ing. Don't lean over battery when attaching
clamps or allow the clamps to touch each other. If
acid splashes in eyes or on skin, flush the contami-
nated area immediately with large quantities of
water.
²A battery generates hydrogen gas which is flam-
mable and explosive. Keep flame or spark away
from the vent holes. Do not use a booster battery
or any other booster source with an output that
exceeds 12 volts.
WHAT TO DO IN EMERGENCIES 341
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