Ford Expedition 1997–1998 — technical service bulletin
Bulletin 4631 · NHTSA communication 615169 · issued Aug 1, 1998
Technical service bulletin
communication type
Power Train
component
1997–1998
model years
7
vehicle entries
Official summary
Brief information on vehicles exhibit vibration at cruise over 50 mph. *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.