Ford Ranger 1998–1999 — technical service bulletin
Bulletin 12153 · NHTSA communication 613172 · issued Nov 1, 1998
Technical service bulletin
communication type
Power Train
component
1998–1999
model years
2
vehicle entries
Official summary
Some 3.0l and 4.0l rangers with 4 x 4 operating in 4.2 mode may exhibit a slight or a rolling thump/bump on slight to moderate acceleration. *mjs
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.