Ford F-250 SD 1999–2000 — technical service bulletin
Bulletin 13940 · NHTSA communication 612933 · issued Mar 1, 2000
Technical service bulletin
communication type
Structure
component
1999–2000
model years
4
vehicle entries
Official summary
Some vehicles equipped with crew cab and built before 2/25/2000 may exhibit a popping noise from the rear of the cab when driving over uneven surfaces. *tt
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.