engine DODGE CHALLENGER 2008 Service Manual

•Shift lever position
•Accelerator position
•Vehicle speed
The gear shifting process is continuously adapted, de-
pendent on the driving style, the driving situation, and
the road characteristics.
NOTE:
•After selecting any driving position, wait a moment to
allow the gear to engage fully before accelerating,
especially when the engine is cold.
•If there is a need to restart the engine, be sure to cycle
the key to the LOCK position before restarting. Trans-
mission engagement may be delayed up to 10 seconds
after restart if the key is not cycled to the LOCK
position first.
•The electronically-controlled transmission provides a
precise shift schedule. The transmission electronics are
self-calibrating. Therefore, the first few shifts on a new
vehicle may be somewhat abrupt or soft until after the
break-in period. This is a normal condition, and pre-
cision shifts will develop within a few shift cycles.
The shift lever is automatically locked while in the PARK
position. To move the shift lever out of the PARK
position, the brake pedal must be firmly depressed before
the shift lock will release.
Move the shift lever to the desired position only when the
engine is idling normally and the brake pedal is applied.
Do not release the brake pedal until ready to drive. The
vehicle may otherwise accelerate quickly when the shift
lever is in DRIVE or REVERSE position.
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WARNING!
Unintended movement of a vehicle could injure those
in and near the vehicle. As with all vehicles, you
should never exit a vehicle while the engine is run-
ning. Before exiting a vehicle, you should always shift
the transmission into PARK, remove the key from the
ignition, and apply the parking brake. Once the key is
removed from the ignition, the transmission shift lever
is locked in the PARK position, securing the vehicle
against unwanted movement. Furthermore, you should
never leave unattended children inside a vehicle.
Over-Temperature Mode
The transmission electronics constantly monitor the trans-
mission oil temperature. If the transmission exceeds nor-
mal operating temperature, the transmission will change
the way it shifts to help control the condition. This mayresult in a slightly different feeling or response during
normal operation in DRIVE position. After the transmis-
sion cools down, it will return to normal operation.
Brake/Transmission Shift Interlock System
This vehicle is equipped with a Brake Transmission Shift
Interlock (BTSI) system that holds the shift lever in the
PARK position when the ignition switch is in the LOCK
position. To move the shift lever out of the PARK
position, the ignition switch must be turned to the ON
position, and the brake pedal must be depressed.
BTSI Override
There is an override for the BTSI that allows you to move
the shift lever out of the PARK position if an electrical
system malfunction occurs (i.e., dead battery). To access
the override (using a flat-bladed screwdriver), carefully
remove the override cover which is located on the right
of the shift lever gate.
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Gear Ranges
PARK
PARK supplements the parking brake by locking the
transmission. The engine can be started in this range.
Never use PARK while the vehicle is in motion. Apply
the parking brake when leaving the vehicle in this range.
When parking on a flat surface, place the shift lever in the
PARK position first, and then apply the parking brake.
When parking on a hill, it is important to set the parking
brake before placing the shift lever in PARK, otherwise
the load on the transmission locking mechanism may
make it difficult to move the shift lever out of PARK. As
an added precaution, turn the front wheels toward the
curb on a downhill grade and away from the curb on an
uphill grade.
WARNING!
Never use PARK position on an automatic transmis-
sion as a substitute for the parking brake. Always
apply the parking brake fully when parked to guard
against vehicle movement and possible injury or
damage.
The following indicators should be used to ensure that
you have engaged the shift lever in the PARK position:
•When shifting into PARK, move the shift lever all the
way forward and to the left until it stops and is fully
seated.
•Look at the shift indicator display on the instrument
panel to ensure it is in the P position.
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CAUTION!
Damage to the shifter could result if the shift lever is
moved out of PARK before the ignition is turned
from the LOCK to ON position.
REVERSE
Shift into REVERSE gear only when the vehicle is com-
pletely stopped.
NEUTRAL
In NEUTRAL, no power is transmitted from the engine to
the drive axle. When the brakes are released, the vehicle
can be moved freely (pushed or towed). Do not engage
NEUTRAL position while driving except to coast when
the vehicle is in danger of skidding (e.g., on icy roads).
The engine may be started in this range. Use this range
for starting your vehicle if it is moving or being towed.
CAUTION!
Coasting the vehicle or driving for any other reason
with the shift lever in NEUTRAL can result in
transmission damage.
WARNING!
Do not coast in NEUTRAL and never turn off the
ignition to coast down a hill. These are unsafe
practices that limit your response to changing traffic
or road conditions. You might lose control of the
vehicle and have an accident.
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DRIVE
This range should be used for most city and highway
driving. It provides the smoothest upshifts and down-
shifts and the best fuel economy.
The transmission automatically upshifts through 5th
gear. The DRIVE position provides optimum driving
characteristics under all normal operating conditions.
When frequent transmission shifting occurs when using
the Overdrive range, such as when operating the vehicle
under heavy loading conditions (in hilly terrain, travel-
ing into strong head winds, or while towing heavy
trailers, use the AutoStickmode and select the “3”
range.
Delayed Shifts in Cold Temperatures
During cold temperature operation, you may notice
delayed upshifts depending on engine and transmission temperature as well as vehicle speed. This feature im-
proves warm up time of the engine and transmission to
achieve maximum efficiency.
Temporary Transmission Limp Home Mode
The transmission is monitored for abnormal conditions.
If a condition is detected that could result in transmission
damage, the transmission will engage Limp Home Mode.
If vehicle acceleration worsens or the transmission no
longer shifts, the transmission is most likely operating in
the Limp Home Mode. In this mode, the transmission
will remain in the current gear until the vehicle is
brought to a stop. After the vehicle has stopped, PARK,
REVERSE, and NEUTRAL will continue to operate. Sec-
ond gear will operate in the DRIVE position. The Mal-
function Indicator Light (MIL) may be illuminated.
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A reset feature is available to allow the vehicle to be
driven to an authorized dealer for service. To reset the
transmission, use the following procedure:
1. Stop the vehicle.
2. Move the shift lever to the PARK position.
3. Turn OFF the engine.
4. Wait approximately 10 seconds.
5. Restart the engine.
6. Move the shift lever to the desired range. If the
problem is no longer detected, the transmission will
return to normal operation.
NOTE:Even if the transmission can be reset, we recom-
mend that you visit your authorized dealer at your
earliest possible convenience. Your authorized dealer has
diagnostic equipment to determine if the problem could
recur. Have the transmission checked at your authorized dealer
as soon as possible.
If the problem has been momentary, the transmission can
be reset to regain all forward gears.
Permanent Transmission Limp Home Mode
Permanent Limp Home Mode will be activated if the
transmission enters temporary Limp Home Mode three
times. Follow the reset procedure described under “Tem-
porary Transmission Limp Home Mode” in this section.
In Permanent Limp Home Mode, PARK, REVERSE, and
NEUTRAL will continue to operate. Second gear will
operate in the DRIVE position. The Malfunction Indicator
Light (MIL) may illuminate.
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AUTOSTICK
Autostickis a driver-interactive transmission that offers
manual gear shifting to provide you with more control of
the vehicle. Autostick allows you to maximize engine
braking, eliminate undesirable upshifts and downshifts,
and improve overall vehicle performance. This system
can also provide you with more control during passing,
city driving, cold slippery conditions, mountain driving,
trailer towing, and many other situations.
Autostick Operation
By placing the shift lever in the DRIVE position, it can be
moved from side to side. This allows the driver to select
a higher or lower range of gears. Moving the shift lever to
the left (-) triggers a downshift and to the right (+) an
upshift. The gear position will display in the instrument
cluster on the transmission range indicator. NOTE:
•In Autostick
mode, the transmission will only shift
up and down when the driver manually moves the
shift lever right (D+) or left (D-).
•An UPSHIFT message will appear in the Electronic
Vehicle Information Center (EVIC) portion of the in-
strument cluster when using Autostick . This message
appears in order to alert the driver to upshift to the
next gear. The UPSHIFT message will display while
operating the vehicle at higher engine revolutions per
minute (RPM).
You can shift in or out of the Autostick mode at any time
without taking your foot off the accelerator pedal. When
you wish to engage Autostick , simply move the shift lever
to the right (D+) or left (D-) while in the DRIVE position.
The transmission will remain in the current gear until an
upshift or downshift is chosen. When you wish to disen-
gage Autostick , hold the shift lever to the right for at least
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one second. The transmission will now operate automati-
cally, shifting between the five available gears.
AutostickGeneral Information
•
You can start out in 1st or 2nd gear. The system will
ignore attempts to upshift at too low of a vehicle speed.
•The transmission will automatically downshift to 1st
gear when coming to a stop.
•Starting out in 2nd gear is helpful in snowy or icy
conditions.
•Avoid using speed control when Autostick is en-
gaged.
•The transmission will not automatically shift up when
maximum engine speed is reached while Autostick is
engaged.
•Transmission shifting will be more noticeable when
Autostick is engaged.
DRIVING ON SLIPPERY SURFACES
Acceleration
Rapid acceleration on snow covered, wet, or other slip-
pery surfaces may cause the rear wheels to pull errati-
cally to the right or left. This phenomenon occurs when
there is a difference in the surface traction under the rear
(driving) wheels.
WARNING!
Rapid acceleration on slippery surfaces is dangerous.
Unequal traction can cause sudden pulling of the rear
wheels. You could lose control of the vehicle and
possibly have an accident. Accelerate slowly and
carefully whenever there is likely to be poor traction
(ice, snow, wet mud, loose sand, etc.).
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Shallow Standing Water
Although your vehicle is capable of driving through
shallow standing water, consider the following Caution
and Warning before doing so.
CAUTION!
•Always check the depth of the standing water
before driving through it. Never drive through
standing water that is deeper than the bottom of
the tire rims mounted on the vehicle.
•Determine the condition of the road or the path
that is under water, and if there are any obstacles
in the way, before driving through the standing
water.
•Do not exceed 5 mph (8 km/h) when driving
through standing water. This will minimize wave
effects.
CAUTION!
•Driving through standing water may cause dam-
age to your vehicle’s drivetrain components. Al-
ways inspect your vehicle’s fluids (i.e., engine oil,
transmission, axle, etc.) for signs of contamination
(i.e., fluid that is milky or foamy in appearance)
after driving through standing water. Do not con-
tinue to operate the vehicle if any fluid appears
contaminated, as this may result in further dam-
age. Such damage is not covered by the New
Vehicle Limited Warranty.
•Getting water inside your vehicle’s engine can
cause it to lock up and stall out, and cause serious
internal damage to the engine. Such damage is not
covered by the New Vehicle Limited Warranty.
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WARNING!
•Driving through standing water limits your vehi-
cle’s traction capabilities. Do not exceed 5 mph (8
km/h) when driving through standing water.
•Driving through standing water limits your vehi-
cle’s braking capabilities, which increases stop-
ping distances. Therefore, after driving through
standing water, drive slowly and lightly press on
the brake pedal several times to dry the brakes.
•Getting water inside your vehicle’s engine can
cause it to lock up and stall out, and leave you
stranded.
•Failure to follow these warnings may result in
injuries that are serious or fatal to you, your
passengers, and others around you.
PARKING BRAKE
The parking brake should always be applied when the
driver is not in the vehicle.
WARNING!
Never use PARK position on an automatic transmis-
sion as a substitute for the parking brake. Always
apply the parking brake fully when parked to guard
against vehicle movement and possible injury or
damage.
When parking on a flat surface, place the shift lever in the
PARK position first and then apply the parking brake.
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