FORD 2010 E-450 v.2 - Manual (Page 304)

If an overfill occurs, excess fluid should be removed by an authorized
dealer.
An overfill condition of transmission fluid may cause shift and/or
engagement concerns and/or possible damage.
Do not use supplemental transmission fluid additives, treatments or
cleaning agents. The use of these materials may affect transmission
operation and result in damage to internal transmission components.
DON'T ADD IF IN CROSSHATCHED AREA • CHECK WHEN HOT IDLING IN PARK
ADD COLD HOT DO NOT ADD
Maintenance and Specifications
304
2010 Econoline (eco)
Owners Guide, 2nd Printing
USA (fus)