{"nhtsa_id":10231775,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-02-13","date":"2023-01-11","document_id":"21-002-23","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; EXTERIOR LIGHTING","mfr_system":null,"summary":"K1 Clutch Snap Ring Repair This bulletin involves replacing the K1 clutch drum snap ring and possibly the K1input shaft drum sub-assembly. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following DiagnosticTrouble Code (DTC) has been set: P0731-00 - Gear 1 Shift Incorrect Ratio. This DTC will set during a key cycle and shifting into drive. Customers may also comment on the following: The transmission will not shift into/out 1st - 4th gears. 5th and reversegears are still available.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10231775-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10231775-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10231775","components":[{"id":"lighting","name":"Lighting","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0731"],"topics":[],"vehicles":[{"make":"RAM","model":"3500","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_ram_3500","2023_ram_3500"]},{"make":"RAM","model":"4500","year_from":2022,"year_to":2023,"match":"exact","vehicle_ids":["2022_ram_4500","2023_ram_4500"]}],"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":[]}