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Service bulletin TSB 20-2013

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10170914
Published by NHTSA2020-02-04
Manufacturer's numberTSB 20-2013
Manufacturer's date2020-01-20
NHTSA componentWHEELS

NHTSA's summary

Some 2013-2018 F-150/Expedition/Navigator vehicles equipped with 4-wheel drive (4WD) may exhibit an intermittent grinding noise while driving in 2-wheel drive (2WD) mode most commonly on acceleration. This may be due to a loss of vacuum to the integrated wheel end (IWE) actuators and/or wear of the IWE components. To correct the condition, follow the Service Procedure steps to reprogram the transfer case control module (TCCM) and replace any worn vacuum and/or IWE components.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Wheels

Vehicles listed
FORD EXPEDITION2013, 2014, 2015, 2016, 2017
FORD F-1502013, 2014, 2015, 2016, 2017, 2018
LINCOLN NAVIGATOR2013, 2014, 2015, 2016, 2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TSB 24-21882024-07-29. Service bulletin. This article supersedes TSB 22-2219 to update the Parts List and Service Procedure to clarify applicable steps by vehicle application. Some 2003-2020 Expedition/Navigator and 2006-2020 F-150 (non-Raptor) vehicles equipped with 4WD may exhibit grinding/clicking/ratcheting noise from the front wheel area. This may be due to partial engagement of the integrated wheel ends (IWE). To correct this condition, follow the Service Procedure to remove and cap the vacuum supply line or to reprogram the transfer case control module (TCCM) and replace any worn vacuum and/or IWE components.
TSB 20-23072020-11-05. Service bulletin. Some 2003-2020 Expedition/Navigator and 2006-2020 F-150 vehicles equipped with TOD transfer cases may exhibit grinding/clicking/ratcheting noise from the front wheel area. This may be due to partial engagement of the integrated wheel ends (IWE). To correct this condition, follow the Service Procedure steps to remove and cap the vacuum supply line.
SSM 471412018-05-21. Service bulletin. Some 2013-2018 F-150/Expedition/Navigator 4x4 vehicles may exhibit an intermittent grinding noise coming from the right front or left front wheel area while accelerating in 2WD mode. Refer to the Workshop Manual (WSM), Section 308-07, Diagnosis and Testing Symptom Chart - NVH > The front axle makes noise in 2H mode only and generally under heavy throttle.
ASI-322702013-10-28. Service bulletin. FORD: THERE IS A NOISE COMING FROM THE FRONT HUB INTEGRATED WHEEL END (IWE) AREAS AND WHEN SHIFTED INTO 4X4 MODE, THE NOISE WILL CEASE. MODELS 2008-2013 F-150, EXPEDITION, NAVIGATOR, MARK LT. *PE