TSB 10-12-4 5.4L 3V and 6R80 transmission - Delalyed/harsh downshift above 40 mph
FORD: 2009-2010 Expedition, F-150
LINCOLN: 2009-2010 Navigator
ISSUE:
Some 2009-2010 Expedition and Navigator vehicles built on or before 5/1/2010 and 2009-2010 F-150 vehicles built on or before 2/1/2010 and equipped with 5.4L 3V engine and 6R80 transmission may exhibit a delayed then harsh downshift during a commanded downshift at speeds above 40 MPH (64 Km/h).
ACTION:
Follow the Service Procedure to correct the condition.
The service procedure basically is a reprogram of the TCM.