How do you turn off the overdrive in 2005 Lincoln navigator?

To turn off the overdrive in a 2005 Lincoln Navigator, locate the gear shift lever. There should be a button labeled "O/D" (overdrive) on the side of the lever. Press this button to deactivate overdrive; the dashboard will typically display an "O/D OFF" indicator to confirm that it's turned off. To re-enable overdrive, simply press the button again.