{"nhtsa_id":634897,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-10","date":"2002-07-01","document_id":"020420003","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT","mfr_system":null,"summary":"SUBJECT REGARDING REVISED SIDE COVER AND GASKET REPLACEMENT (RH) / DIFFERENTIAL CARRIER COVER AND SEAL REPLACEMENT - RIGHT. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/634897","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"differential","name":"Differential","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CORVETTE","year_from":1997,"year_to":2002,"match":"exact","vehicle_ids":["1997_chevrolet_corvette","1998_chevrolet_corvette","1999_chevrolet_corvette","2000_chevrolet_corvette","2001_chevrolet_corvette","2002_chevrolet_corvette"]}],"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":[]}