FORD 2012 F-250 - Manual (Page 402)

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 196°F-216°F
(91°C-102°C) on a level surface. The normal operating temperature can
be reached after approximately 20 miles (30 km) of driving.
Type A
Type B
High fluid level
Type A
Type B
Fluid levels above the safe range may result in transmission failure. An
overfill condition of transmission fluid may cause shift and/or
engagement concerns and/or possible damage.
High fluid levels can be caused by an overheating condition.
ADD COLD HOT DO NOT ADD
ADD COLD HOT DO NOT ADD
Maintenance and Specifications
402
2012 F-250/350/450/550 (f23)
Owners Guide, 4th Printing
USA (fus)