Land Rover Defender 2021–2023 — technical service bulletin
Bulletin SFCC_JUL2022_39 · NHTSA communication 10217283 · issued Jul 14, 2022
Technical service bulletin
communication type
Power Train
component
2021–2023
model years
6
vehicle entries
Official summary
Whining Noise From Transfer Case
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.