2008 Ford F250 Owner Guide 4th Printing - Page 22

Instrument Cluster Battery voltage gauge (manual transmission only): Indicates the battery voltage when the ignition is in the RUN position. If the pointer moves and stays outside the normal operating range, have the vehicle's electrical system checked as soon as possible. Transmission fluid temperature gauge (automatic transmission only): If the gauge is in the: Normal area (normal) - the transmission fluid is within the normal operating temperature (between "H" and "C"). Yellow area (warning) - the transmission fluid is higher than normal operating temperature. This can be caused by special operation conditions (i.e. snowplowing, towing or off road use). Refer to Special Operating Conditions in the scheduled maintenance information for instructions. Operating the transmission for extended periods of time with the gauge in the yellow area may cause internal transmission damage. Altering the severity of the driving conditions is recommended to lower the transmission temperature into the normal range. Red area (over temperature) - the transmission fluid is overheating. Stop the vehicle to allow the temperature to return to normal range. If the gauge is operating in the Yellow or Red area, stop the vehicle and verify the airflow is not restricted such as snow or debris blocking airflow through the grill. If the gauge continues to show high temperatures, see your authorized dealer. 22 2008 F-250/350/450/550 (f23) Owners Guide (post-2002-fmt) USA (fus)