Service bulletins for the 2019 Ford F-150
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
332 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Transfer case are shown. Show all
| SSM 49099 | 2020-11-04. Service bulletin. POWER TRAIN; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). 2019-2020 F-150 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 0 deg C (32 deg F) and 3 km (2 mi) when below 0 deg C (32 deg F). The strategy changes were implemented to improve vacuum supply management and axle warm up in cold temperatures. The engine must run for a minimum of 5 minutes to build sufficient vacuum before performing any vacuum related testing. Refer to the Workshop Manual (WSM) Section, 307-08A > Four-Wheel Drive Systems > System Operation and Component Description for additional information. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.