{"nhtsa_id":10201081,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-09-05","date":"2021-08-19","document_id":"21B47","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"In all of the affected vehicles, a one-speed transfer case was installed instead of the two-speed transfer case that was intended to be installed with the heavy duty trailer tow package. As a result, the Slow Climb drive mode and the Neutral Tow setting will not be available on the Instrument Panel Cluster (IPC) message center display. This will prohibit the vehicle from being flat-towed and may cause poor drivability in extreme off-road conditions.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201081-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201081-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201081","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"LINCOLN","model":"NAVIGATOR","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_lincoln_navigator"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}