Jeep bulletin 21-066-26
What it says6-Speed Manual Shifter Cable Misaligned Customers may experience the following: SYMPTOM: Rough shifting between gears. NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service bulletin dated Oct 23, 2026, received Oct 29, 2026, about the power train. It names 2 model years (2026–2027). 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 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.
6-Speed Manual Shifter Cable Misaligned Customers may experience the following: SYMPTOM: ● Rough shifting between gears. Particularly difficult shifting from 3rd gear into 1st or 2nd gear. This bulletin involves adjusting the transmission shift cables.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 21-066-26 | Service bulletin | Oct 23, 2026 | 11038773 |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 21-35-35-91 | Cables, Transmission Shift - Adjust (1 - Semi-Skilled) 3 - Manual Transmission | 0.7 hrs |
Read by machine from the document NHTSA serves (2 pages), read Oct 31, 2026. A part number is shown only where it matches Jeep’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 themA 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 2 model years this bulletin names have filed 12 complaints with NHTSA since 2015.
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 group67 other manufacturer communications filed against the Jeep Wrangler under the same component group (power train), newest first. The eight newest are listed; the rest are on the Jeep list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| S2621000004 | Service bulletin | Sep 30, 2026 | The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tec… |
| 114741 | Service bulletin | Sep 24, 2026 | TRANSMISSION KIT - WITH TORQUE CONVERTER |
| 9100904 | Service bulletin | Sep 10, 2026 | Shifter If shifter is having trouble shifting between 1st and 2nd gear, then adjust cables as described in service library. |
| 03-003-26 | Service bulletin | Jul 16, 2026 | Rear Driveshaft Out Of Balance Customers may comment on one or more of the following: SYMPTOM: ● Vehicle exhibits a vibration that increases… |
| 21-041-26 | Service bulletin | Jun 18, 2026 | Transmission Auxiliary Oil Pump Failure Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPT… |
| S2621000003 | Service bulletin | Mar 9, 2026 | The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8… |
| S2603000001 | Service bulletin | Feb 25, 2026 | A suspected leak may be noticed on the front or rear axle pinion seal. |
| 9100749 Rev 1 | Service bulletin | Jan 7, 2026 | axle seal We have observed that some JL/JT rear axle shafts are leaking oil. Replace axle shaft and seal together. Do not replace seal only.… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jeep, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Jeep 21-066-26 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 21-066-26 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. Every Stellantis warranty extension on file lists the ones Stellantis has filed.
Which vehicles does 21-066-26 cover?
The manufacturer filed it against 2 model years: 2027 Jeep Wrangler, 2026 Jeep Wrangler. 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 on or before 3 Sep 2026 — the build date is on the certification label in the driver’s door jamb.