PACCAR service campaign 14-037
What it saysAn improved transmission bracket is now available for replacement on certain chassis equipped with a PACCAR TX-12 transmission, featuring a more durable design for enhanced long-term performance. NHTSA’s full summary ↓
PACCAR filed this with NHTSA as a service campaign dated Aug 11, 2026, received Aug 20, 2026. It names 36 model years across Kenworth and Peterbilt (2024–2027). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
One page for every brand it was filed under. Each brand’s bulletins: Kenworth · Peterbilt.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
An improved transmission bracket is now available for replacement on certain chassis equipped with a PACCAR TX-12 transmission, featuring a more durable design for enhanced long-term performance.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 14-037 | Service campaign | Aug 11, 2026 | 11036288 | PDF, 401 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themKenworth 20 model years
Also filed against: 2024 Kenworth T280; 2025 Kenworth T280; 2026 Kenworth T280; 2027 Kenworth T280; 2024 Kenworth T380; 2025 Kenworth T380; 2026 Kenworth T380; 2027 Kenworth T380; 2024 Kenworth T480; 2025 Kenworth T480; 2026 Kenworth T480; 2027 Kenworth T480; 2024 Kenworth T680; 2025 Kenworth T680; 2026 Kenworth T680; 2027 Kenworth T680; 2024 Kenworth T880; 2025 Kenworth T880; 2026 Kenworth T880; 2027 Kenworth T880.
Peterbilt 16 model years
Also filed against: 2024 Peterbilt 537; 2025 Peterbilt 537; 2026 Peterbilt 537; 2027 Peterbilt 537; 2024 Peterbilt 548; 2025 Peterbilt 548; 2026 Peterbilt 548; 2027 Peterbilt 548; 2024 Peterbilt 567; 2025 Peterbilt 567; 2026 Peterbilt 567; 2027 Peterbilt 567; 2024 Peterbilt 579; 2025 Peterbilt 579; 2026 Peterbilt 579; 2027 Peterbilt 579.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kenworth and Peterbilt, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is PACCAR 14-037 a recall?
No. A service campaign is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls.
Is the 14-037 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 14-037 cover?
The manufacturer filed it against 36 model years across 2 brands (Kenworth and Peterbilt): 2024 Kenworth T280, 2025 Kenworth T280, 2026 Kenworth T280, 2027 Kenworth T280, 2024 Kenworth T380, 2025 Kenworth T380 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 9 Oct 2023 – 5 Feb 2026; built 18 Jan 2023 – 20 May 2026; built on or after 18 Jan 2023 — the build date is on the certification label in the driver’s door jamb.