# Service bulletin 21\-023\-25

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11015665
- Published by NHTSA: 2025\-03\-17
- Manufacturer's number: 21\-023\-25
- Manufacturer's date: 2025\-03\-14
- NHTSA component: POWER TRAIN
- Manufacturer's system: Transmission Control Module \(TCM\) Updates

## NHTSA's summary

"Flash: Transmission Control Module \(TCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P1DB7\-00\- Torque Converter Clutch Performance. Customers may also experience one or more of the following: ● The check engine light illuminates. ● Overheating of the transmission fluid. REPAIR SUMMARY: This bulletin involves reprogramming the TCM with the latest available software."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11015665-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11015665-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Trouble codes named

P1DB7

## Vehicles listed

- 2022 JEEP GLADIATOR

## Recalls for the same vehicles and component

- [23V641000](/recalls/nhtsa/23V641000.md), 2023-09-18: POWER TRAIN:MANUAL TRANSMISSION
- [2023089](/recalls/tc/2023089.md), 2023-02-23: Powertrain
- [23V116000](/recalls/nhtsa/23V116000.md), 2023-02-23: POWER TRAIN:CLUTCH ASSEMBLY
- [22V639000](/recalls/nhtsa/22V639000.md), 2022-08-25: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:PARK PAWL

## Other bulletins for the same vehicles and component

- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [18\-007\-26 REV B](/bulletins/11031449.md), 2026-04-22, Service bulletin: ENGINE; POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0301 \- Cylinder 1 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0302 \- Cylinder 2 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0303 \- Cylinder 3 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0304 \- Cylinder 4 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0305\-00 \- Cylinder 5 Misfire \(Active or Stored status set during cold start catalyst heating\). ● P0306\-00 \- Cylinder 6 Misfire \(Active or Stored status set during cold start catalyst heating\).\*\* ● P0300 \- Multiple Cylinder Misfire. ● P0032 \- O2\-Sensor 1/1 Heater Circuit High. ● P0038\-02 \- O2\-Sensor 1/2 Heater Circuit High. ● P0052\-02 \- O2\-Sensor 2/1 Heater Circuit High. ● P0058\-02 \- O2\-Sensor 2/2 Heater Circuit High. ● P0132\-02 \- O2 Sensor 1/1 Circuit High. ● P0138\-02 \- O2 Sensor 1/2 Circuit High. ● P0152\-02 \- O2 Sensor 2/1 Circuit High. ● P0158\-02 \- O2 Sensor 2/2 Circuit High. ● P2100 \- Electronic Throttle Control Motor Circuit. ● P2107 \- Electronic Throttle Control Module Processor. ● P0129 \- Barometric Pressure Out Of Range Low. China Market Only ● P08A6 \- Gear Lever Position Sensor System \- Multiple Sensor Correlation. \(Manual Transmission Only\). ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P1129 \- Closed Loop Fueling Not Achieved \- Bank 2 Upstream. Customers may also comment on one or more of the following: ● \*\*The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain.\*\* J18 FSAR\-TSB\-7200 \-2\- ● "Service Transmission" message in the Instrument Panel Cluster \(IPC\) due to clutch slip detection with the transfer case in neutral \(Manual Transmission Only\). NOTE: Customers might experience wheel spin or slippage and the PCM could
- [S2603000001](/bulletins/11029774.md), 2026-03-05, Service bulletin: POWER TRAIN. A suspected leak may be noticed on the front or rear axle pinion seal.
- [S2621000003](/bulletins/11029770.md), 2026-03-05, Service bulletin: POWER TRAIN. Service transmission/check engine warning indicator for the 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV transmissions that have fault codes P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [18\-007\-26 REV.A](/bulletins/11029675.md), 2026-03-05, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P08A6 – Gear Lever Position Sensor System – Multiple Sensor Correlation \(Manual Transmission Only\). ● P152F – Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. Customers may also comment on one or more of the following: ● "Service Transmission” message on in the Instrument Panel Cluster \(IPC\) due to clutch slip detection \(Manual Transmission Only\). NOTE: Customers might experience wheel spin or slippage and the PCM could interpreted the wheel spin or slippage as slipping the clutch too much and to avoid clutch damage, the customer may see the message in the IPC. ● Vehicle is in limp home mode. Other software enhancements included: ● Engine oil pump in high pressure mode with cold engine oil to improve valvetrain component reliability. This bulletin involves reprogramming the PCM with the latest available software.
- [9100627](/bulletins/11020855.md), 2025-07-23, Service bulletin: POWER TRAIN. To inform dealers about the 850RE valve body PN: R8348504A connector: the original 16\-pin connector included six pins that were not used in this application. To simplify the design, the connector has been optimized and updated to a 10\-pin configuration.
- [21\-009\-25 REV. C](/bulletins/11020636.md), 2025-07-09, Service bulletin: POWER TRAIN. 850RE 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 one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch.
- [9100570](/bulletins/11018453.md), 2025-05-19, Service bulletin: POWER TRAIN. "Transmission Fluid Please note fluid color/condition/odor is NOT an indicator of transmission health and should not be used as the reason for unit replacement. Visible ""glitter"" or debris in the pan does not justify complete unit replacements."
- [9100534 Rev 1](/bulletins/11018452.md), 2025-05-19, Service bulletin: POWER TRAIN. Transmission "Transmission For transmission concerns related to DTCs P0733\-00, P1DA8\-00, and/or P1D92\-00, a repair is available, and transmission replacement is NOT required. Please reference TSB 21\-009\-25 Rev. A, for details on D\-clutch replacement. Please also note, visible ""glitter"" or debris in the pan and fluid color/condition/odor is NOT an indicator of transmission health and should not be used as the reason for unit replacement. Complete unit replacements instead of repairs for these DTCs may be subject to chargeback."
- [21\-009\-25 REV. B](/bulletins/11016879.md), 2025-04-08, Service bulletin: POWER TRAIN. "850RE 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 one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch."

JSON: [/v1/bulletins/11015665](/v1/bulletins/11015665)

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