Ford Expedition 1999–2000 — technical service bulletin
Bulletin 13737 · NHTSA communication 620269 · issued Mar 1, 2001
Technical service bulletin
communication type
Power Train
component
1999–2000
model years
10
vehicle entries
Official summary
Inoperative or inaccurate speedometer as well as 4x4 light inoperative and / or diagnostic trouble code p1635 and / or p1639 after a powertrain control module (pcm) has been replaced. *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.