Freightliner Cascadia 2007–2017 — technical service bulletin
Bulletin sb3531 · NHTSA communication 10140784 · issued Jul 1, 2015
Technical service bulletin
communication type
Power Train
component
2007–2017
model years
11
vehicle entries
Official summary
sb3531 Differential Lubrication, Detroit Model 6 Axles
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.