FORD 2012 E-450 - Manual (Page 288)

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.
The transmission fluid should be in this range if at normal operating
temperature (150°F-170°F [66°C-77°C]).
H
C
ADD COLD HOT DO NOT ADD
Maintenance and Specifications
288
2012 Econoline (eco)
Owners Guide, 1st Printing
USA (fus)