Ford bulletin TSB 23-2144
What it saysSome 2023 Bronco/Explorer/Aviator vehicles equipped with a 10R60 automatic transmission built on 8-Dec-2022 and through 22-Dec-2022 may exhibit a whine noise during coast down from 25 mph (40 km/h). NHTSA’s full summary ↓
Ford filed this with NHTSA as a service bulletin dated Jun 5, 2023, received Jun 7, 2023, about the power train. It names 3 model years across Ford and Lincoln (2023). 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.
One page for every brand it was filed under. Each brand’s bulletins: Ford · Lincoln.
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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.
Some 2023 Bronco/Explorer/Aviator vehicles equipped with a 10R60 automatic transmission built on 8-Dec-2022 and through 22-Dec-2022 may exhibit a whine noise during coast down from 25 mph (40 km/h). Vehicles built on 6-Feb-2023 and through 1-Mar-2023 may exhibit a whine noise during acceleration in 1st gear. These conditions may be caused by the machining of the No. 4 shell and sun gear. To correct the conditions, follow the Service Procedure to replace No. 4 shell and sun gear.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TSB 23-2144 | Service bulletin | Jun 5, 2023 | 10237578 | PDF, 343 KB |
What the document itself lists
Parts the bulletin names — the first 40 it lists
| Part number | Description | Qty | Find it |
|---|---|---|---|
| HL3Z-7G199-A | Auxiliary Pump Tube Seal (Auto-Stop-Start vehicles) | 1 | eBay Motors → |
| L1MZ-7D062-A | No. 4 Shell And Sun Gear (S4) | 1 | eBay Motors → |
| LC3Z-7H223-A | Front Support Bolt Seals | 12 | eBay Motors → |
| LP5Z-7A248-A | Torque Converter Seal | 1 | eBay Motors → |
| LP5Z-7B031-A | Front Support To Case Seal | 1 | eBay Motors → |
| LP5Z-7G091-A | Input Shaft Seal (F9) | 1 | eBay Motors → |
| LP5Z-7G091-D | Input Shaft Seals (F2) | 5 | eBay Motors → |
| LP5Z-7G091-E | Input Shaft To Sun Gear No. 3 Shaft Seals (F8) | 5 | eBay Motors → |
| 7L1Z-7J227-A | Transmission Fluid Cooler O-ring Seals | 4 | eBay Motors → |
| 7T4Z-7Z302-A | Transmission Fluid Filter Seal | 1 | eBay Motors → |
| HL3Z-7A191-B | Fluid Pan Gasket | 1 | eBay Motors → |
| HL3Z-7J227-A | Auxiliary Pump Tube O-ring | — | eBay Motors → |
| LP5Z-7A527-L | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-M | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-N | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-P | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-Q | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-R | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-S | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-T | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-U | T-3 Shim | 1 | eBay Motors → |
| LP5Z-7A527-V | T-3 Shim | 1 | eBay Motors → |
| W520214-S440 | Sway Bar/Stabilizer Bar Bracket | 3 | eBay Motors → |
| W715618-S437 | — | 2 | |
| W520515-S442 | — | — | |
| W720940-S440 | Stabilizer Bar Link Upper Nuts | — | eBay Motors → |
| JB3Z-4B496-B | Pinion Flange Bolts & Retaining Straps-Front | — | eBay Motors → |
| KB3Z-6L612-A | Catalytic Converter Gasket (2.3L) | 1 | eBay Motors → |
| LB3Z-4B496-A | CV Joint-To-Transfer Case Flange Cup Bolts | — | eBay Motors → |
| MB3Z-5A215-B | Exhaust Clamp (2.7L) | 1 | eBay Motors → |
| MB3Z-5C226-A | Right Exhaust Manifold Gasket (2.7L) | 1 | eBay Motors → |
| MB3Z-5C226-B | Exhaust Manifold Gasket (3.0L) | 2 | eBay Motors → |
| MB3Z-9450-B | Exhaust Flexible Pipe Flange Gasket (2.3L) | 1 | eBay Motors → |
| W500121-S439 | Transfer Case Bolts | 8 | eBay Motors → |
| W500642-S439 | Transmission Support Insulator Bolts, Right | — | eBay Motors → |
| W520103-S442 | Exhaust Flexible Pipe Flange Nuts (2.3L) | 2 | eBay Motors → |
| W713314-S439 | Exhaust Hanger Bracket Bolts (2.7L) | 2 | eBay Motors → |
| W714265-S442 | Catalytic Converter Nut 4 2 For 2.7L, 3 For | — | eBay Motors → |
| W714409-S439 | Steering Column Lower Shaft Coupler | — | eBay Motors → |
| W717376-S439B | Stabilizer Bar Undershield Bolts (If equipped) | 1 | eBay Motors → |
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 232144A | 2023 Aviator AWD 3.0L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 8.6 hrs |
| 232144B | 2023 Aviator RWD 3.0L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 8.1 hrs |
| 232144C | 2023 Explorer RWD 2.3L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 9.5 hrs |
| 232144D | 2023 Explorer 4WD 2.3L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 10.5 hrs |
| 232144E | 2023 Explorer RWD 3.0L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 8.2 hrs |
| 232144F | 2023 Explorer 4WD 3.0L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 8.7 hrs |
| 232144G | 2023 Explorer 4WD 3.3L TiVCT: Replace The No. 4 Shell And Sun Gear And Perform… | 10 hrs |
| 232144H | 2023 Bronco 2.3L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform… | 12.4 hrs |
| 232144J | 2023 Bronco 2.7L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform Adaptive… | 12 hrs |
| 232144K | 2023 Bronco 3.0L EcoBoost: Replace The No. 4 Shell And Sun Gear And Perform Adaptive… | 9.8 hrs |
| 232144L | 2023 Bronco Additional Time If Equipped With Electronic Sway Bar Disconnect (Do Not… | 0.8 hrs |
Read by machine from the document NHTSA serves (6 pages), 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 themFord 2 model years
Lincoln 1 model year
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 375 complaints with NHTSA since 2015. 34 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.
Within the first 500 miles on my brand new bronco, I noticed a strange burning smell after driving it one day. The next morning when I started it, I heard what I thought was a heat shield rattle, and as I continued to drive my bronco to work throughout the week the noise got worse.
2023 Ford Bronco · Power Train · filed with NHTSA Feb 16, 2023 · ODI 11507718
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 group99 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 55284 | Service bulletin | Oct 27, 2026 | Some 2021-2023 Bronco vehicles equipped with a MT88 manual transmission may exhibit no 3rd gear engagement and/or a grinding noise going int… |
| TSB 26-2408 v2 | Service bulletin | Oct 22, 2026 | This bulletin supersedes 26-2309. Reason for update: update the Model section to remove Aviator 10R80, update theParts list to add 3.3L to W… |
| TSB 26-2431 | Service bulletin | Oct 21, 2026 | This bulletin supersedes 26-2226. Reason For Update: update the Service Procedure for 2021-2022 F-150 3.5L EcoBoost vehicles with the new Fo… |
| TSB 26-2408 | Service bulletin | Sep 22, 2026 | This bulletin supersedes 26-2309. Reason For Update: update the Model section to remove Aviator 10R80, update the Parts list to add 3.3L to… |
| TSB 26-2395 | Service bulletin | Aug 26, 2026 | This article supersedes 26-2287. Reason for update: update the labor operation numbers to add MT to operations C, F, G, H, J, K, L and M, an… |
| SSM 55073 | Service bulletin | Aug 10, 2026 | Some 2021-2026 Bronco vehicles may require the removal and installation of the transfer case for various reasons. Installation requires Loct… |
| SSM55059 | Service bulletin | Aug 3, 2026 | Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost engine, 2020-2026 Explorer vehicles equipped with a 3.3L hybrid engine, and 20… |
| TSB 26-2309 | Service bulletin | Jul 2, 2026 | This bulletin supersedes 26-2241. Reason For Update: update the parts list to correct the claim quantity of the part number JB3Z-4B496-B fro… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ford and Lincoln, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford TSB 23-2144 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 TSB 23-2144 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 TSB 23-2144 cover?
The manufacturer filed it against 3 model years across 2 brands (Ford and Lincoln): 2023 Ford Bronco, 2023 Ford Explorer, 2023 Lincoln Aviator. 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 6 Feb 2023 – 1 Mar 2023; built 8 Dec 2022 – 22 Dec 2022 — the build date is on the certification label in the driver’s door jamb.