Ford Econoline 1997 — technical service bulletin
Bulletin BC5203961001 · NHTSA communication 50479 · issued Oct 1, 1996
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997
model years
1
vehicle entries
Official summary
'off-idle' vibration/boom/drone emitting from the exhaust system on vehicles equipped w/ 4.2l engines. *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.