Ford Ranger 1998–1999 — technical service bulletin
Bulletin 6408 · NHTSA communication 606833 · issued Jun 1, 1999
Technical service bulletin
communication type
Power Train
component
1998–1999
model years
2
vehicle entries
Official summary
Some vehicles with 4x4 option while operating in 4x2 mode may exhibit a light or a rolling thump / bump sensation on slight to moderate acceleration and deceleration. *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.