1. Overdrive is a fuel-saving feature that allows the transmission to shift into a higher gear when the vehicle reaches a certain speed. This causes the engine to run at a lower RPM, which in turn improves fuel efficiency.
2. On the 2005 Vibe, overdrive is engaged by pressing the "OD OFF" button on the center console. When the OD OFF button is pressed, the transmission will no longer shift into overdrive gear.
3. Overdrive should be turned off when driving in hilly or mountainous terrain, or when towing a trailer. Turning off overdrive allows the engine to run at a higher RPM and produce more torque, which makes it easier to maintain speed.
4. Overdrive can also be turned off to improve acceleration. When the OD OFF button is pressed, the transmission will shift down into a lower gear, causing the engine to accelerate more quickly.
5. Overdrive is turned on by default, so drivers do not need to worry about turning it on and off unless they are in specific driving conditions.
