TSB 2021–2022 F150 Harsh Engagement — 26-2431

[F150 Tremor Forum]

Technical Service Bulletin · TSB 26-2431

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: Oct 21, 2026
Applies to: F-150 (2021–2022 model years)

Restrictions stated in the source:

• Engine: 3.5L

Also listed in the source (outside this forum's coverage): Expedition 2022, Explorer 2020–2022, Mustang 2021–2022, Transit 2020–2022

Summary (official text)​

This bulletin supersedes 26-2226. Reason For Update: update the Service Procedure for 2021-2022 F-150 3.5L EcoBoost vehicles with the new Ford Diagnosis and Repair System (FDRS) C clutch data anomaly detection diagnostic test. 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 (DTCs) 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 PCM software and/or axial movement of the CDF clutch cylinder (7H351) 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 c

Supersedes: TSB 26-2226

Sources​

• TSB 26-2431 (PDF, NHTSA document 11038707) — Oct 21, 2026

Details from NHTSA as of Oct 30, 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.