2009 Ford E250 Cargo Owner Guide 2nd Printing - Page 299

Maintenance and Specifications Low fluid level Do not drive the vehicle if the fluid level is at the bottom of the dipstick and the ambient temperature is above 50°F (10°C). ADD COLD HOT DO NOT ADD Correct fluid level The transmission fluid should be checked at normal operating temperature 150°F-170°F (66°C-77°C) on a level surface. The normal operating temperature can be reached after approximately 20 miles (30 km) of driving. You can check the fluid without driving if the ambient temperature is above 50°F (10°C). However, if fluid is added at this time, an overfill condition could result when the vehicle reaches normal operating temperature. 299 2009 Econoline (eco) Owners Guide, 2nd Printing USA (fus)