2009 Jeep Liberty Owner's Manual - Page 301

STARTING AND OPERATING 299 Overdrive Operation The overdrive automatic transmission contains an electronically controlled 4th speed (OVERDRIVE). The transmission will automatically shift from 3rd gear to OVERDRIVE if the following conditions are present: • the shift lever is in DRIVE • the engine coolant has reached normal operating temperature • 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 desirable gear for operation at this temperature. If the transmission temperature becomes hot enough, the "Transmission Temperature Warning Light" may illuminate 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). 5