Ford F-250 SD 2011–2014 — technical service bulletin
Bulletin ASI-44371 · NHTSA communication 10055063 · issued Jan 1, 2014
Technical service bulletin
communication type
Power Train
component
2011–2014
model years
8
vehicle entries
Official summary
Ford: after a cold soak start up, some trucks may experience a squealing noise that is normal wetness around rear output seal, from residual lubrication used at time of assembly. Model 2011-2014 f250, 350 4x4 crew cab. *pe
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.