Ford F-250 SD 2008 — technical service bulletin
Bulletin 06221 · NHTSA communication 10021623 · issued Oct 22, 2007
Technical service bulletin
communication type
Power Train
component
2008
model years
6
vehicle entries
Official summary
Helix angle and tooth pressure angle count and look the same. Installing a z92 gear on this transmission will result in premature failure. *kb updated 12/12/07. *nj
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.