2008 HB Dodge Durango Owner Manual

Overdrive Operation
The overdrive automatic transmission contains an electronically
controlled fourth and fifth (if equipped) speed
(Overdrive). The transmission will automatically shift
from Drive to Overdrive if the following conditions are
present:
• the transmission selector is in Drive;
• the engine coolant has reached normal operating temperature;
• vehicle speed is above approximately 30 mph (48
km/h);
• the “TOW/HAUL” switch has not been activated;
• transmission has reached normal operating temperature.
STARTING AND OPERATING 279
NOTE: If the vehicle is started in extremely cold temperatures,
the transmission may not shift into Overdrive
and will automatically select the most desirable gear for
operation at this temperature. Normal operation will
resume when the transmission fluid temperature has
risen to a suitable level. Refer also to the Note under
torque converter clutch, later in this section.
If the transmission temperature gets extremely hot, the
transmission will automatically select the most desirable
gear for operation at this temperature. If the transmission
temperature becomes hot enough the TRANS TEMP light
may illuminate and the transmission may downshift out
of Overdrive until the transmission cools down. After
cooldown, the transmission will resume normal operation.
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