{"nhtsa_id":10181987,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-11-04","date":"2020-10-09","document_id":"20B35","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT; ENGINE; POWER TRAIN","mfr_system":null,"summary":"Some of the affected all-wheel driver (AWD) vehicles were assembled with mismatched front to rear final drive gear ratios. AWD vehicles with mismatched gear ratios may exhibit front end shudder upon acceleration and/or the Traction Control System (TCS) may activate. If the TCS activates, an icon on the cluster advising the driver that the TCS is active may illuminate, leading to engine torque reduction to slow the vehicle. The transfer case clutch will continue to wear until AWD function becomes unavailable. Some of the affected rear wheel drive (RWD) vehicles were assembled with incorrect rear final drive gear ratios. Drive characteristics are not noticeably changed.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10181987-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10181987-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10181987","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"TRANSIT","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_ford_transit"]}],"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":[]}