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When frequent transmission shifting occurs (such as
when operating the vehicle under heavy loading condi-
tions, in hilly terrain, traveling into strong head winds,
or while towing heavy trailers), use the AutoStick®
shift control (refer to “AutoStick®” in this section for
further information) to select a lower gear. Under
these conditions, using a lower gear will improve per-
formance and extend transmission life by reducing
excessive shifting and heat buildup.
If the transmission temperature exceeds normal oper-
ating limits, the powertrain controller will modify the
transmission shift schedule and expand the range of
torque converter clutch engagement. This is done to
prevent transmission damage due to overheating.
During cold temperatures, transmission operation may
be modified depending on engine and transmission
temperature as well as vehicle speed. This feature
improves warm up time of the engine and transmission
to achieve maximum efficiency.
Engagement of the torque converter clutch is inhibited
until the transmission fluid is warm (refer to the "Note"
under "Torque Converter Clutch" in this section).
During extremely cold temperatures (-27°C or below),
operation may briefly be limited to only second gear
(for four-speed transmission) or third gear (for six-
speed transmission).
Transmission Limp Home Mode
Transmission function is monitored electronically for
abnormal conditions. If a condition is detected that
could result in transmission damage, Transmission
Limp Home Mode is activated. In this mode, the trans-
mission remains in second gear (for four-speed trans-
mission) or third gear (for six-speed transmission)
regardless of which forward gear is selected. PARK,
REVERSE, and NEUTRAL will continue to operate.
The Malfunction Indicator Light (MIL) may be illumi-
nated. Limp Home Mode allows the vehicle to be
driven to an authorized dealer for service without
damaging the transmission.
In the event of a momentary problem, the transmission
can be reset to regain all forward gears by performing
the following steps:
1. Stop the vehicle.
2. Shift the transmission into PARK.
3. Turn the ignition switch to the LOCK/OFF position.
4. Wait approximately 10 seconds.
5. Restart the engine.
6. Shift into the desired gear range. If the problem is no
longer detected, the transmission will return to
normal operation.
252
KNOWING
YOUR
VEHICLE
SAFETY
STARTING
AND
DRIVING
WARNING
LIGHTS
AND
MESSAGES
IN AN
EMERGENC
Y
SERVICING
AND CARE
TECHNICAL
SPECIFICATIONS
CONTENTS
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