Ford Expedition 2019 — technical service bulletin
Bulletin SSM 48088 · NHTSA communication 10163587 · issued Jul 17, 2019
Technical service bulletin
communication type
Power Train
component
2019
model years
3
vehicle entries
Official summary
2019 F-150/Expedition/Navigator vehicles equipped with four-wheel drive (4WD) have a revised transfer case control module (TCCM) strategy that will affect integrated wheel end (IWE) operation after initial start up. The TCCM will not energize the solenoid to supply vacuum to the IWEs after the initial key cycle and a driven gear is selected. The IWEs will remain engaged for 0.8 km (0.5 mi) when the temperature is above 0Ã â C (32Ã â F) and 3 km (2 mi) when below 0Ã â C (32Ã â F). The strategy changes were implemented to improve vacuum supply management and axle warm up in cold temperatures. Th
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.