Ford F Super Duty 1999 — technical service bulletin
Bulletin 12277 · NHTSA communication 615530 · issued Dec 1, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999
model years
1
vehicle entries
Official summary
Some vehicles with 7.3l / 4r100 transmission may exhibit an increase in engine rpm of 200 - 300 rpm between shifts (shift flare). *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.