Freightliner Cascadia 2017–2020 — technical service bulletin
Bulletin SF586A · NHTSA communication 10164386 · issued Sep 4, 2019
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2017–2020
model years
4
vehicle entries
Official summary
Field Service Campaign to fix issue related to interaxle driveline contacting anti-lock brake system (ABS) relay valve fitting in certain situations when the suspension air is completely dumped.
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.