Ford 1989 Bronco Owner's Manual page 303

Maintenance and Specifications
ADD COLD HOT DO NOT ADD
The transmission fluid should be in this range if at normal operating
temperature (150°F-170°F [66°C-77°C]).
DON'T ADD IF IN CROSSHATCHED AREA • CHECK WHEN HOT IDLING IN PARK
ADD COLD HOT DO NOT ADD
The transmission fluid should be in this range if at ambient temperature
(50°F-95°F [10°C-35°C]).
303
2010 Econoline (eco)
Owners Guide, 3rd Printing
USA (fus)