Some 2008-2009 Ford F-Super Duty, Econoline and LCF vehicles built between 5-18-2007 and 11-1-2008 and operated in cold climates of –35 degrees Fahrenheit and colder that are equipped with a 5R110W transmission, built without the factory installed external in-line transmission filter can experience premature low/reverse one way clutch failure. This can be caused by a lack of lubrication in severe cold temperatures.
Verify the vehicle build date and verify that the external in-line transmission filter is not present. Overhaul the transmission following the workshop manual, section 307-01.
While performing the transmission overhaul, replace the front pump with a 9C3Z-7A103-B pump assembly. This new replacement pump assembly can be identified by the engineering part number (9C3P-7A103-AC) visibly etched on the machined front face adjacent to a bolt hole.
NOTE: Do not install the 9C3Z-7A103-B pump into a vehicle that is equipped with a factory installed external in-line transmission filter.
