{"nhtsa_id":10201637,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-09-30","date":"2021-09-24","document_id":"TSB 21-2330","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Some 2020 Mustang GT350 - 2020-2021 Mustang Mach 1/Shelby GT500 vehicles may exhibit a rear differential fluid leak at the differential cooler line fittings. This may be due to a seal within the fittings. To correct the condition, follow the service procedure to replace both rear differential cooler line fittings.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201637-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201637-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201637","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"MUSTANG","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_ford_mustang","2021_ford_mustang"]}],"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":[]}