{"vehicle":{"id":"2023_ford_f-450","year":2023,"make":"Ford","model":"F-450"},"code":"P0771","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":4,"bulletins":[{"nhtsa_id":11036283,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-08-19","date":"2026-08-12","document_id":"TSB 26-2375","mfr_campaign":null,"component":"POWER TRAIN; ENGINE; ELECTRICAL SYSTEM","summary":"This article supersedes TSB 26-2050 to increase the labor operation allowance of labor operations A and B. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Poor shift quality Illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) P2704 and P0771 stored in the PCM/TCM. This may be due to a calibration in the TCM and/or wear between the input shaft and the E clutch hub causing the input shaft O-rings to become damaged resulting in an open E clutch circuit. Additional model information: 6.7L Diesel Engine 2022-2024 F-550 or F-600 F-Super Duty vehicles built on or before 15-May-2024 with over 5,000 miles (8,000km)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036283-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036283-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036283"},{"nhtsa_id":11029924,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-10","date":"2026-03-02","document_id":"TSB 26-2086","mfr_campaign":null,"component":"POWER TRAIN","summary":"Some of the vehicles listed in the Model statement above may exhibit poor shift quality with an illuminated powertrain malfunction (wrench) indicator and diagnostic trouble codes (DTC) P2704 and P0771 stored in the transmission control module (TCM). This may be due to the software in the TCM. Additional model information: 6.7L Diesel Engine 2023-2024 F-Super Duty F-250/F-350/F-450 2024 F-Super Duty F-550/F-600 built on or after 16-May-2024","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029924-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029924-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029924"},{"nhtsa_id":11028838,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-17","date":"2026-02-16","document_id":"TSB 26-2050","mfr_campaign":null,"component":"POWER TRAIN","summary":"This article supersedes TSB 24-2142 to update the Parts List, Service Procedure (Steps 1-2), and increase the labor operation allowances to reprogram the PCM/TCM. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Poor shift quality Illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) P2704 and P0771 stored in the PCM/TCM. This may be due to a calibration in the TCM and/or wear between the input shaft and the E clutch hub causing the input shaft O-rings to become damaged resulting in an open E clutch circuit. Additional model information: 6.7L Diesel Engine 2022-2024 F-550 or F-600 F-Super Duty vehicles built on or before 15-May-2024 with over 5,000 miles (8,000km)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028838-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028838-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028838"},{"nhtsa_id":11001575,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-06-12","date":"2024-06-06","document_id":"TSB 24-2142","mfr_campaign":null,"component":"POWER TRAIN","summary":"This article supersedes TSB 23-2376 to update the Part List and the Service Procedure. Some 2022-2024 F-550 and F-600 F-Super Duty vehicles equipped with a 10R140 automatic transmission and 6.7L diesel engine may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTCs) P2704 and P0771 stored in the transmission control module (TCM) with poor shift quality and over 5,000 miles (8,000 km) in service. This may be due to wear between the input shaft and the E clutch hub causing the input shaft O-rings to become damaged resulting in an open E clutch circuit. To correct this condition, follow the Service Procedure to replace the E clutch hub and input shaft O-rings.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11001575-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11001575-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11001575"}],"url":"https://open.wenmarpro.com/makes/ford/f-450/2023/bulletins?code=P0771"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/ford/f-450/2023/codes/P0771","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}