Stellantis bulletin 21-029-25
What it says8HP75 D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must have at least 11,265 km (7,000 mi.) and exhibit/set one or more of the following Diagnostic Trouble… NHTSA’s full summary ↓
Stellantis filed this with NHTSA as a service bulletin dated Jul 4, 2025, received Apr 9, 2025, about the power train — 2 documents under this number: 21-029-25 REV. A and 1 more. It names 8 model years across Jeep and Ram (2020–2023). 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: Jeep · Ram.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as NHTSA’s summary states it — build dates and equipment as the manufacturer filed them. The dealer checks the VIN and the build date on the door jamb; a vehicle outside the window is not covered by this bulletin.
8HP75 D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must have at least 11,265 km (7,000 mi.) and exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. Customers may also comment on the following: ● Vehicle enter limp home mode. This bulletin involves replacing the D clutch.
Trouble codes it names: P0733 P1D92 P1DA8 all 3 read from the document itself; NHTSA’s summary names none
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 21-029-25 REV. A | Service bulletin | Jul 4, 2025 | 11020637 | |
| 21-029-25 | Service bulletin | Apr 4, 2025 | 11016884 | PDF, 1,036 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 68723676AA | Shaft Kit, Output D Clutch Repair Kit | — | eBay Motors → |
| 68722049AA | Shaft Kit, Output D Clutch Repair Kit | — | eBay Motors → |
| 68723677AA | Shaft Kit, Output D Clutch Repair Kit | — | eBay Motors → |
| 68218925AB | Fluid, Automatic | — | eBay Motors → |
| 68153921AA | Mopar Antifreeze/Coolant | — | eBay Motors → |
| 68049954AC | Lubricant, Transfer Case | — | eBay Motors → |
| 68089195AA | Lubricant, Transfer Case | — | eBay Motors → |
| 06506497AA | Bolt, Hex Flange Head | — | eBay Motors → |
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 21-00-64-96 | D Clutch - Inspect and Replace DT | 5.5 hrs |
| 21-00-64-95 | D Clutch - Replace WS | 5.4 hrs |
| 21-00-64-60 | Skid Plate - DT | 0.4 hrs |
| 21-00-64-66 | 4x4/AWD Equipped - DT | 0.6 hrs |
| 21-00-62-66 | 4x4/AWD Equipped - WS | 1 hrs |
| 21-00-00-51 | Adaptation Procedure DT/WS | 1 hrs |
Read by machine from the document NHTSA serves (33 pages), read Sep 30, 2026. A part number is shown only where it matches Stellantis’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 themJeep 4 model years
Ram 4 model years
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 8 model years this bulletin names have filed 2,610 complaints with NHTSA since 2015. 269 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.
On the 2020 Ram 1500, the 24 owners who gave an odometer reading for Power Train reported it at a median of 22,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2022 Jeep Grand Wagoneer. The contact stated while driving approximately 52 MPH, the cruise control inadvertently disengaged and the vehicle was unable to accelerate as needed. There was an unknown warning light illuminated, and a message to service the vehicle was displayed. The vehicle was not diagnosed or repaired.
2022 Jeep Grand Wagoneer · Power Train · filed with NHTSA Jul 29, 2022 · ODI 11476499
Was sitting at a light (auto engine shut-off was on). When the light turned green, lifted off the break to push the gas to go. Truck shut off, all lights on the dashboard lit up and truck was automatically shifted into park with emergency brake on. Attempted to restart the truck several times. Truck finally started after 8th attempt.
2022 Ram 1500 · Power Train · filed with NHTSA May 25, 2022 · ODI 11466039
The contact owns a 2021 Ram 1500. The contact stated that while driving at an undisclosed speed, the vehicle stalled and shifted to park inadvertently. The contact restarted the vehicle however, the vehicle would not move because the automatic emergency braking had engaged inadvertently. The vehicle was not diagnosed nor repaired.
2021 Ram 1500 · Power Train · filed with NHTSA Apr 19, 2021 · ODI 11412814
In depth: 2022 Ram 1500 transmission and drivetrain problems → · 2021 Ram 1500 transmission and drivetrain problems → · 2020 Ram 1500 transmission and drivetrain problems →
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 group122 other manufacturer communications filed against these Stellantis models 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 |
|---|---|---|---|
| 18-071-26 REV. B | Service bulletin | Oct 6, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may… |
| 18-075-26 | Service bulletin | Oct 3, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 115032 | Service campaign | Oct 3, 2026 | Customer Satisfaction Notification A0D – Electronic Shift Module - Dealer Notification The Electronic Shift Module (ESM) software on about 2… |
| 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… |
| 21-062-26 | Service bulletin | Sep 25, 2026 | Transmission Rattle Customers may comment on the following: SYMPTOM: ● Rattle noise coming from the transmission. This bulletin involves ins… |
| 114477 | Service campaign | Sep 4, 2026 | Revised Customer Satisfaction Notification 74D – Powertrain Modules Software Update Dealer Notification The powertrain modules software on a… |
| 114026 | Service campaign | Aug 12, 2026 | CUSTOMER SATISFACTION NOTIFICATION NORTH AMERICA Powertrain Modules Software Update 80D The powertrain modules software on about 3,300… |
| 114025 | Service campaign | Aug 12, 2026 | CUSTOMER SATISFACTION NOTIFICATION NORTH AMERICA Powertrain Modules Software Update 79D The powertrain modules software on about 36 of the a… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jeep and Ram, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Stellantis 21-029-25 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 21-029-25 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 21-029-25 cover?
The manufacturer filed it against 8 model years across 2 brands (Jeep and Ram): 2023 Jeep Grand Wagoneer, 2022 Jeep Grand Wagoneer, 2023 Jeep Wagoneer, 2022 Jeep Wagoneer, 2023 Ram 1500, 2022 Ram 1500 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.