FORD 2012 F-550 v.1 - Manual (Page 405)

Low fluid level
Type A
Type B
Do not drive the vehicle if there is no indication of fluid on the dipstick
and the ambient temperature is above 50°F (10°C).
Correct fluid level
For vehicles equipped with 5-speed transmissions, the fluid should be
checked at normal operating temperature 150°F-170°F (66°C-77°C) on a
level surface. For vehicles equipped with 6-speed transmissions, the fluid
should be checked at normal operating temperature 180°F-200°F
(82°C-93°C) on a level surface. The normal operating temperature can
be reached after approximately 20 miles (30 km) of driving.
Type A
Type B
ADD COLD HOT DO NOT ADD
ADD COLD HOT DO NOT ADD
Maintenance and Specifications
405
2012 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)