It's telling you there maybe something wrong with your transmission. Have the codes read and go from there.
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.
The overdrive light to flash on 2005 Ford Expedition is caused by either the sensor problem or the electronic pressure control problem for the tranny.
The 2005 Lincoln Navigator has 24 valves.
The 2005 Lincoln Navigator has a V8 engine.
The 2005 Lincoln Navigator has a 6-speed automatic.
The 2005 Lincoln Navigator is a gas-powered vehicle.
The maximum payload of the 2005 Lincoln Navigator is 1670 lbs..
The 2005 Lincoln Navigator is 17 ft. 3.5 in. (207.5 in.) long.
The height of the 2005 Lincoln Navigator is 6 ft. 5.8 in. (77.8 in.).
The 2005 Lincoln Navigator has a drag coefficient of .41 Cd.
The curb weight of the 2005 Lincoln Navigator is 5555 lbs..
The 2005 Lincoln Navigator has single overhead cam (SOHC).