Service bulletin SSM 51531
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10234125 |
| Published by NHTSA | 2023-05-04 |
| Manufacturer's number | SSM 51531 |
| Manufacturer's date | 2023-04-03 |
| NHTSA component | POWER TRAIN |
NHTSA's summary
Some 2020-2023 Explorer/Aviator/Transit, 2021-2023 F-150/Bronco, 2022-2023 Expedition/Navigator/Mustang and 2023 F-250/F-350 Super Duty vehicles may exhibit harsh/delayed engagement and/or harsh/delayed shift concerns. These may be addressed with the powertrain control module (PCM)/transmission control module (TCM) Transmission Accelerated Main Control Break In Routine and/or a main control overhaul. Refer to Workshop Manual (WSM), Section 307-01, DTC Chart if DTCs are present and/or Diagnosis By Symptom to identify the clutch(s) to be cycled. Cycling the shift solenoids and clutch control valves to remove contamination must be performed along with an adaptive drive cycle before attempting repair. For claiming, use causal part 7A100 and applicable labor operations in Section 7 of the Service Labor Time Standards (SLTS) Manual.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Transmission and driveline
| FORD BRONCO | 2021, 2022, 2023 |
|---|---|
| FORD EXPEDITION | 2022, 2023 |
| FORD EXPLORER | 2020, 2021, 2022, 2023 |
| FORD F-150 | 2021, 2022, 2023 |
| FORD F-250 SD | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-350 SD | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-450 SD | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-550 SD | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-650 SD | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| FORD F-750 SD | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| FORD MUSTANG | 2022, 2023 |
| FORD TRANSIT | 2020, 2021, 2022, 2023 |
| LINCOLN AVIATOR | 2020, 2021, 2022, 2023 |
| LINCOLN NAVIGATOR | 2022, 2023 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 2026311 | 2026-06-24. Powertrain |
|---|---|
| 26V402000 | 2026-06-24. POWER TRAIN:AUTOMATIC TRANSMISSION |
| 2026188 | 2026-04-15. Powertrain |
| 26V236000 | 2026-04-14. POWER TRAIN:AUTOMATIC TRANSMISSION |
| 2025691 | 2025-12-12. Powertrain |
| 25V863000 | 2025-12-12. POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:PARK PAWL |
| 2025414 | 2025-08-08. Powertrain |
| 25V512000 | 2025-08-08. POWER TRAIN:AXLE HUBS |
| 2025137 | 2025-03-14. Powertrain |
| 2025135 | 2025-03-14. Powertrain |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| TSB 26-2375 v2 | 2026-10-13. Service bulletin. NOTE: This bulletin has been updated, refer to the change log at the bottom for details. Issue: 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 DTCs 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 theinput shaft O-rings to become damaged resulting in an open E clutch circuit. Action: For vehicles that meet all of the criteria in the Issue and Model statements, follow the Service Procedure toreprogram the PCM / TCM and/or replace the E clutch hub and input shaft O-rings |
|---|---|
| SSM 55218 | 2026-10-06. Service bulletin. For 20202026 vehicles equipped with the 10R140 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum transducer (PVT) when available. Workshop Manual (WSM) updates related to this diagnostic procedure are planned for release in Q4 2026. The new test improves the accuracy of detecting leaks within transmission fluid circuits and replaces the previous air check method. The previous air check procedure has been shown to produce a high rate of false positives, which may lead to unnecessary repairs when no actual leak is present. Accordingly, the air check procedure is not to be used for diagnosing internal transmission hydraulic leaks or as justification for transmission replacement. |
| TSB 26-2408 | 2026-09-30. Service bulletin. This bulletin supersedes 26-2309. Reason For Update: update the Model section to remove Aviator 10R80, update the Parts list to add 3.3L to W520514-S440, and add L1MZ-7Z490-G valve body separator plate for Aviator. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * Harsh 3-4, 4-5 upshifts * Harsh 5-3, 4-3 downshifts * Harsh reverse engagements These symptoms may be worse when cold. This may be due to the F clutch friction plates brinelling into the clutch and planetary container cylinder (7B177). |
| PCM-26.10.3 Bronco | 2026-09-21. Over-the-air update. 25S75 Recall remedy -Powertrain Control Module update to introduce logic to prevent low pressure fuel pump binding and maintain fuel flow to the engine. |
| TSB 26-2395 | 2026-09-01. Service bulletin. This article supersedes 26-2287. Reason for update: update the labor operation numbers to add MT to operations C, F, G, H, J, K, L and M, and correct the part number LIMZ-4A015-B to L1MZ-4A015-B. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Harsh engagement Delayed engagement Harsh shift Delayed shift Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC)s P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to axial movement of the CDF clutch cylinder sleeve causing hydraulic circuit leaks. NOTE: If internal transmission service is required to address a concern detected with the CDF clutch cylinder following this article, technicians should carefully inspect and replace other transmission components and flush transmission fluid cooler only as ne |
| TSB 26-2375 | 2026-08-19. Service bulletin. 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) |
| PT-26.13.13 F-150 Ltng | 2026-08-18. Over-the-air update. 25C69 Recall remedy - Updates the Secondary On-Board Diagnostic Module C to provide for release of the Integrated Park Module slider in the event a bind condition occurs allowing park to be engaged |
| SSM 55073 | 2026-08-11. Service bulletin. Some 2021-2026 Bronco vehicles may require the removal and installation of the transfer case for various reasons. Installation requires Loctite® 243 adhesive applied to the mounting bolt threads in the transmission. Make sure that the mating faces are clean and dry. Tightening the mounting bolts also requires an updated two-stage tightening sequence. Workshop Manual (WSM), Sections 307-07C/D and 308-07C/D Installation > Transfer Case have been updated to reflect this change. |
| TSB 26-2360 | 2026-08-10. Service bulletin. Some of the vehicles listed in the Model Statement above may exhibit an intermittent extended crank with no relevant diagnostic trouble codes (DTCs) present. This may be due to various software parameters in the powertrain control module (PCM). |
| SSM55059 | 2026-08-03. Service bulletin. Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost engine, 2020-2026 Explorer vehicles equipped with a 3.3L hybrid engine, and 2020-2023 Lincoln Aviator vehicles equipped with a 3.0L EcoBoost hybrid engine may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble code (DTC) P0A1E stored in the powertrain control module (PCM). The vehicle may be unable to enter electric-only drive modes as expected during normal drive cycles. This may be due to the belt integrated starter generator (BISG). For vehicles with this condition, follow the necessary Pinpoint Test in Workshop Manual (WSM), Section 303-06 for DTC P0A1E and repair the vehicle as directed. Note that previous replacement of the BISG does not negate the need for subsequent BISG replacements if directed to do so by the appropriate Pinpoint Test diagnostics. Engineering is investigating this BISG quality concern. Monitor PTS for updates regarding this investigation. |