Ford F-250 SD 1999 — technical service bulletin
Bulletin 12758 · NHTSA communication 607075 · issued May 1, 1999
Technical service bulletin
communication type
Power Train
component
1999
model years
4
vehicle entries
Official summary
Some vehicles equipped with 7.3l diesel engines and 4r100 transmissions and having a vehicle buid date prior to 12/7/1998, may exhibit a harshness / surge / jerk on heavy throttle 2-3 and / or 3-4 upshifts. *tt
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.