Ford F-250 SD 2020–2026 — technical service bulletin
Bulletin SSM 55218 · NHTSA communication 11038166 · issued Oct 6, 2026
Technical service bulletin
communication type
Power Train
component
2020–2026
model years
34
vehicle entries
Official summary
For 2020 2026 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 unnec
Vehicles covered
- 2020 Ford F-250 SD
- 2021 Ford F-250 SD
- 2022 Ford F-250 SD
- 2023 Ford F-250 SD
- 2024 Ford F-250 SD
- 2025 Ford F-250 SD
- 2026 Ford F-250 SD
- 2020 Ford F-350 SD
- 2021 Ford F-350 SD
- 2022 Ford F-350 SD
- 2023 Ford F-350 SD
- 2024 Ford F-350 SD
- 2025 Ford F-350 SD
- 2026 Ford F-350 SD
- 2020 Ford F-450 SD
- 2021 Ford F-450 SD
- 2022 Ford F-450 SD
- 2023 Ford F-450 SD
- 2024 Ford F-450 SD
- 2025 Ford F-450 SD
- 2026 Ford F-450 SD
- 2020 Ford F-550 SD
- 2021 Ford F-550 SD
- 2022 Ford F-550 SD
- 2023 Ford F-550 SD
- 2024 Ford F-550 SD
- 2025 Ford F-550 SD
- 2026 Ford F-550 SD
- 2024 Ford F-650 SD
- 2025 Ford F-650 SD
- 2026 Ford F-650 SD
- 2024 Ford F-750 SD
- 2025 Ford F-750 SD
- 2026 Ford F-750 SD
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.