Jeep Grand Wagoneer 2019–2025 — technical service bulletin
Bulletin 9100409 · NHTSA communication 11007201 · issued Sep 6, 2024
Technical service bulletin
communication type
Power Train
component
2019–2025
model years
15
vehicle entries
Official summary
TRANSFER CASE Before replacing a transfer case unit for fault codes C1444-98 and/or C1477-4B, be sure to reference TSB 21-048-24 for potential transfer case shift motor replacement
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.