TSB 2023–2024 Super Duty Poor Shift Quality — 26-2086

[Ford Tremor Forum]

Technical Service Bulletin · TSB 26-2086

This is a Technical Service Bulletin, not a recall. A TSB tells dealers how to diagnose and repair a specific symptom when a truck comes in with it. It doesn't mean every truck listed has the problem, and it doesn't by itself make the repair free -- coverage depends on your warranty and the dealer's diagnosis.

Published: Mar 2, 2026
Applies to: F-250, F-350 (2023–2024 model years)

Restrictions stated in the source:

• Build dates: 2024 F-Super Duty F-550/F-600 built on or after 16-May-2024
• Engine: 6.7L Diesel Engine

Also listed in the source (outside this forum's coverage): F-450 SD 2023–2024, F-550 SD 2023–2024, F-600 SD 2024

Summary (official text)​

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

Sources​

• TSB 26-2086 (PDF, NHTSA document 11029924) — Mar 2, 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.