{"nhtsa_id":11032650,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-05-13","date":"2026-05-08","document_id":"21-039-26","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Replace K1 Clutch / Input Shaft Assembly Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P0731-00 - Gear 1 Shift Incorrect Ratio (This DTC will set during a key cycle and shifting into Drive). Customers must also comment on the following: ● The transmission will not shift into or out of 1st - 4th gears. 5th and reverse gears are still available This bulletin involves replacing the K1 clutch and possibly the K1 input shaft drum sub-assembly. These repairs are to be performed only if the vehicle is inoperable due to K1 clutch failure","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032650-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032650-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11032650","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0731"],"topics":[],"vehicles":[{"make":"RAM","model":"3500","year_from":2019,"year_to":2023,"match":"exact","vehicle_ids":["2019_ram_3500","2020_ram_3500","2021_ram_3500","2022_ram_3500","2023_ram_3500"]},{"make":"RAM","model":"4500","year_from":2019,"year_to":2023,"match":"exact","vehicle_ids":["2019_ram_4500","2020_ram_4500","2021_ram_4500","2022_ram_4500","2023_ram_4500"]},{"make":"RAM","model":"5500","year_from":2019,"year_to":2023,"match":"exact","vehicle_ids":["2019_ram_5500","2020_ram_5500","2021_ram_5500","2022_ram_5500","2023_ram_5500"]}],"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":[]}