Ford F-53 2014–2021 — technical service bulletin
Bulletin SSM 51234 · NHTSA communication 10228849 · issued Dec 6, 2022
Technical service bulletin
communication type
Equipment
component
2014–2021
model years
8
vehicle entries
Official summary
Some 2014-2021 F53 Motorhome/F-59 Commercial Stripped Chassis may exhibit a pinion seal leak. A new part number is available to to resolve this concern, MU9Z-4676-A. For claiming, use causal part number 4676 and applicable labor times in Section 04 of the Service Labor Time Standards (SLTS) Manual.
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.