Dodge Durango Owner's Manual page 297

Overdrive Operation
The automatic transmission contains an electronically
controlled fourth and fifth (if equipped) speed (OVER-
DRIVE). 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 tem-
perature;
vehicle speed is above approximately 30 mph
(48 km/h);
the TOW/HAUL switch has not been activated;
transmission has reached
temperature.
NOTE: If the vehicle is started in extremely cold tem-
peratures, the transmission may not shift into OVER-
DRIVE 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 "Transmission
Temperature Indicator Light" may illuminate and the
transmission may downshift out of OVERDRIVE until
the transmission cools down. After cooldown, the trans-
normal operating mission will resume normal operation.
The transmission will downshift from OVERDRIVE to
DRIVE if the accelerator pedal is fully depressed at
vehicle speeds above approximately 35 mph (56 km/h).
STARTING AND OPERATING 295
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