Jeep 2009 Liberty - Owner Manual - Manual (Page 301)

Overdrive Operation
The overdrive automatic transmission contains an elec-
tronically controlled 4th speed (OVERDRIVE). The trans-
mission will automatically shift from 3rd gear to OVER-
DRIVE if the following conditions are present:
• the shift lever 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 button has not been activated
• the transmission has reached normal operating
temperature
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 to the “Note” under
“Torque Converter Clutch” in this section.
• If the transmission temperature gets extremely hot, the
transmission will automatically select the most desir-
able gear for operation at this temperature. If the
transmission temperature becomes hot enough, the
“Transmission Temperature Warning Light” may illu-
minate and the transmission may downshift out of
OVERDRIVE until the transmission cools down. After
the transmission cools down, the transmission will
resume normal operation.
The transmission will downshift from OVERDRIVE to
DRIVE if the accelerator pedal is fully pressed at vehicle
speeds above approximately 35 mph (56 km/h).
STARTING AND OPERATING 299
5