Ford Expedition 1997–1998 — technical service bulletin
Bulletin 983284 · NHTSA communication 607451 · issued Feb 6, 1998
Technical service bulletin
communication type
Structure
component
1997–1998
model years
4
vehicle entries
Official summary
Some vehicles may experience an audible 50 hz body boom. *tt
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.