Ford F-150 2019–2020 — technical service bulletin
Bulletin SSM 48630 · NHTSA communication 10172986 · issued Mar 12, 2020
Technical service bulletin
communication type
Suspension
component
2019–2020
model years
2
vehicle entries
Official summary
SSM 48630 - 2019-2020 F-150/Expedition/Navigator - Updated Diagnostic Procedure For The Intergrated Wheel End (IWE) System Some 2019-2020 F-150/Expedition/Navigator four wheel drive vehicles may exhibit a grinding/clicking/ratcheting noise from front axle area in 2H mode under acceleration or heavy loads. The WSM diagnostic routine for the IWE vacuum system has been updated with new leak specifications and a more efficient diagnostic process. Refer to Workshop Manual (WSM), Section 308-07A > Symptom Chart - NVH for the symptom Grinding/clicking/ratcheting noise from front axle in 2H mode under
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.