Ford bulletin SSM 52423
What it saysSome 2024 F-Super Duty non-Tremor vehicles equipped with four-wheel drive (4WD) may exhibit a slight rotational grinding noise from the front axle while driving in two-wheel drive (2WD). NHTSA’s full summary ↓
Ford filed this with NHTSA as a service bulletin dated Apr 8, 2024, received Apr 25, 2024, about the power train. It names 7 model years (2024). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationSome 2024 F-Super Duty non-Tremor vehicles equipped with four-wheel drive (4WD) may exhibit a slight rotational grinding noise from the front axle while driving in two-wheel drive (2WD). If the noise does not occur with the vehicle driven in 4WD, this may be due to the non-selectable right side hublock on the front axle. To correct the condition, replace the right front hublock with a selectable hublock, service part number PC3Z-3B396-A. Refer to Workshop Manual (WSM), Section 307-07A. Vacuum lines with service base part numbers 3C125 and/or 3C124 may need to be installed if not present on the vehicle. Refer to the parts catalog. Suspension modifications may contribute to the concern. Inspect the vehicle for aftermarket levelling or lift kits as well as aftermarket caster/camber adjusting sleeves. If any vehicle modifications are present, this is not a warrantable repair. Do not submit a claim. Use the Report a Vehicle Concern link at the bottom of the OASIS report to submit a report detailing the presence or lack of aftermarket equipment with photos attached to the report. Reference this article by number in the text of the report.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SSM 52423 | Service bulletin | Apr 8, 2024 | 10253557 | PDF, 71 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| PC3Z-3B396-A | — | — |
Read by machine from the document NHTSA serves (1 page), read Sep 30, 2026. A part number is shown only where it matches Ford’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 themAlso filed against model years this site has no page for: 2024 Ford F-550 SD; 2024 Ford F-600 SD; 2024 Ford F-650 Incomplete Chassis; 2024 Ford F-750 SD.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 3 model years this bulletin names have filed 94 complaints with NHTSA since 2015. 13 of them name Power Train — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The contact owns a 2024 Ford F-350. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly downshifted. There was no warning light illuminated. The vehicle was taken to the dealer but was not diagnosed or repaired. The dealer informed the contact that a software update had been completed on the TCM.
2024 Ford F-350 Super Duty · Power Train · filed with NHTSA Jul 16, 2025 · ODI 11674055
Slight vibration at highway speed accompanied by faint grinding noise. Ford installed front auto locker to only one front wheel and a dummy full time locker to right front wheel in non trimmer 2024 f250 and f350s. They know the problem because they issued a tsb 52423 but do not contact truck owners of issue.
2024 Ford F-250 Super Duty · Power Train · filed with NHTSA Aug 12, 2025 · ODI 11680075
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the power train
Source: same model, same component group64 other manufacturer communications filed against these Ford models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Ford list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM 55218 | Service bulletin | Oct 6, 2026 | For 20202026 vehicles equipped with the 10R140 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford… |
| TSB 26-2088 v2 | Service bulletin | Oct 1, 2026 | This bulletin supersedes 24-2249. Reason for update: update the claim quantity of the torque converter nuts, part number and claim quantity… |
| TSB 26-2406 | Service bulletin | Sep 5, 2026 | Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Poor shift quality Illumi… |
| TSB 26-2252 | Service bulletin | Sep 5, 2026 | Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Poor shift quality Illumi… |
| SSM 55098 | Service bulletin | Aug 18, 2026 | Some 2013-2016 Super Duty vehicles equipped with a 6.7L diesel engine and 2015-2019 Transit vehicles equipped with a 3.2L diesel engine may… |
| SSM 54900 | Service bulletin | Jun 4, 2026 | Some 2023-2026 F-Super Duty vehicles equipped with a 10R100 or 10R140 transmission may exhibit an intermittent failure to engage forward or… |
| SSM 54899 | Service bulletin | Jun 4, 2026 | Some 2023-2026 F-53 Motorhome Chassis/F-59 Commercial Stripped Chassis and 2024-2026 F-650/F-750/E-Series vehicles equipped with a 6R140 tra… |
| TSB 26-2263 | Service bulletin | May 30, 2026 | 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… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ford, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford SSM 52423 a recall?
No. A service bulletin 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, or on its page here.
Is the SSM 52423 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does SSM 52423 cover?
The manufacturer filed it against 7 model years: 2024 Ford F-250 Super Duty, 2024 Ford F-350 Super Duty, 2024 Ford F-450 Super Duty, 2024 Ford F-550 SD, 2024 Ford F-600 SD, 2024 Ford F-650 Incomplete Chassis and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.