2005 Jeep Liberty Owner's Manual - Page 233

STARTING AND OPERATING 233 Overdrive (O/D) For most city and highway driving. The transmission contains an electronically controlled Overdrive, and will automatically shift from D (Drive) to O/D (Overdrive) if the following conditions are present: • The transmission selector is in D (Drive). • The O/D OFF button has not been activated. • Vehicle speed is above approximately 30 mph (48 km/h). • Transmission has reached normal operating temperature. When frequent transmission shifting occurs while using Overdrive, such as when operating the vehicle under heavy load conditions (for example, in hilly terrain, strong head winds, or trailer towing), turning off overdrive will improve performance and extend transmission life by reducing excessive shifting and heat buildup. O/D Off Button 5 Overdrive can be locked out by pressing the O/D OFF button located on side of the gearshift lever. The O/D OFF indicator light will illuminate to show that the switch has been activated. When the indicator light is on, Overdrive is locked out. Pressing the switch a second time restores the Overdrive function. The lockout feature is useful when towing a trailer or carrying a heavy load.