TSB 2024–2026 Super Duty No Upshift Past Second Gear — 26-2263

[Ford Tremor Forum]

Technical Service Bulletin · TSB 26-2263

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: May 30, 2026
Applies to: F-250, F-350 (2024–2026 model years)

Also listed in the source (outside this forum's coverage): Expedition 2024–2026, Explorer 2024–2026, F-150 2024–2026, F-450 SD 2024–2026, F-550 SD 2024–2026, Mustang 2024–2026, Transit 2024–2026

Summary (official text)​

This bulletin supersedes 26-2112. Reason For Update: add 2026 model year vehicles, update LV fluid XT-10-QLVC and CXT-10-LV6 description to add "Transfer Case Fluid 4WD Only", and update Step 4 to inspect/replace 7H351 and 7B177 outside of this article. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: - No upshift past second gear - Unable to achieve third gear ratio - Illuminated MIL with DTCs P0757 and P2701 This may be due to a damaged one-way clutch (OWC).

Supersedes: TSB 26-2112

Sources​

• TSB 26-2263 (PDF, NHTSA document 11033575) — May 30, 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.