SSM 2020–2026 Super Duty Power Train — 55218

[Ford Tremor Forum]

Special Service Message · SSM 55218

This is a Special Service Message, not a recall. SSMs are informational notes Ford sends dealers about a known condition or a change in procedure. They are not repair orders, and they don't by themselves change what is covered.

Published: Oct 6, 2026
Applies to: F-250, F-350 (2020–2026 model years)

Restrictions stated in the source:

• Transmission: 10R140
• Equipment: equipped with the 10R140 transmission

Also listed in the source (outside this forum's coverage): F-450 SD 2020–2026, F-550 SD 2020–2026, F-650 SD 2024–2026, F-750 SD 2024–2026

Summary (official text)​

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 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.

Sources​

• SSM 55218 (PDF, NHTSA document 11038166) — Oct 6, 2026

Details from NHTSA as of Oct 7, 2026. If NHTSA or Ford revises this notice, this post is updated and significant changes are noted in a reply. The linked documents are the authority, and a dealer can confirm whether it applies to your VIN.

Have you experienced this issue with your truck? Let us know your model year and engine, plus any diagnosis or repair details.