# Service bulletin 9100749

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: 11027644
- Published by NHTSA: 2026\-01\-14
- Manufacturer's number: 9100749
- Manufacturer's date: 2026\-01\-07
- NHTSA component: POWER TRAIN

## NHTSA's summary

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. Keep original seal and axle shaft and send the parts as fast track.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027644-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027644-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2023 to 2026 JEEP WRANGLER
- 2023 to 2026 JEEP WRANGLER 4XE

## 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
- [2022672](/recalls/tc/2022672.md), 2022-11-23: Powertrain

## 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 \(850RE Transmission Only\)
- [114741](/bulletins/11037596.md), 2026-09-30, Service bulletin: POWER TRAIN. TRANSMISSION KIT \- WITH TORQUE CONVERTER
- [9100904](/bulletins/11037349.md), 2026-09-17, Service bulletin: POWER TRAIN. Shifter If shifter is having trouble shifting between 1st and 2nd gear, then adjust cables as described in service library.
- [03\-003\-26](/bulletins/11035159.md), 2026-07-23, Service bulletin: POWER TRAIN. Rear Driveshaft Out Of Balance Customers may comment on one or more of the following: SYMPTOM: ● Vehicle exhibits a vibration that increases with speed that can be felt in the seat or floor. ● Oil is leaking from the Constant Velocity \(CV\) joint cover. This bulletin involves replacing the rear drive shaft.
- [21\-041\-26 REV. A](/bulletins/11034324.md), 2026-07-02, Service bulletin: POWER TRAIN. Transmission Auxiliary Oil Pump Failure Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set \*\*one or more the following Diagnostic Troubles Code \(DTCs\): ● U0287\-00 \- Lost Communication With Transmission Fluid Pump Module 1.\*\* ● P0B0D\-00 \- Electric/Auxiliary Transmission Fluid Pump Motor Control Module. Customers may also comment on the following: ● Vehicle is in limp mode. This bulletin involves replacing the transmission oil pump.
- [21\-041\-26](/bulletins/11032847.md), 2026-05-20, Service bulletin: POWER TRAIN. Transmission Auxiliary Oil Pump Failure Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0B0D\-00 \- Electric/Auxiliary Transmission Fluid Pump Motor Control Module. Customers may also comment on the following: ● Vehicle is in limp mode This bulletin involves replacing the transmission oil pump.
- [18\-048\-26](/bulletins/11031453.md), 2026-04-22, Service bulletin: POWER TRAIN; ENGINE. 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 \(DTCs\): ● P0300 \- Multiple Cylinder Misfire \(Active or Stored status set during cold start catalyst heating\). ● 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 \(Active or Stored status set during cold start catalyst heating\). Customers may also comment on one or more of the following: ● The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain. This bulletin involves reprogramming the PCM with the latest available software.
- [18\-046\-26](/bulletins/11031451.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 \(DTCs\): ● \*\*P0300 \- Multiple Cylinder Misfire \(Active or Stored status set during cold start catalyst heating\). ● 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 \(Active or Stored status set during cold start catalyst heating\).\*\* ● P08A6 \- Gear Lever Position Sensor System \- Multiple Sensor Correlation. ● P152F \- Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P1129 \- Closed Loop Fueling Not Achieved \- Bank 2 Upstream. ● P0152\-02 \- O2 Sensor 2/1 Circuit High. ● P0158\-02 \- O2 Sensor 2/2 Circuit High. ● P2504 \- Charging System Output High. ● P0563 \- Battery/System Voltage High. Customers may also comment on one or more of the following: ● \*\*The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain. ● "Service Transmission" message in the Instrument Panel Cluster \(IPC\) due to clutch slip detection with the transfer case in neutral. NOTE: Some customers may experience wheel spin or traction loss. In these situations, the Powertrain Control Module \(PCM\) may interpret the event as excessive clutch slip. To prevent potential clutch damage, a message may be displayed in the Instrument Panel Cluster \(IPC\).\*\* ● Clutch is overheating. ● Clutch is slipping on engagement. ● Inability to accelerate uphill. M18 FSAR\-TSB\-7162 \-2\- ● Vehicle does not start. ● Vehicle is stuck in limp\-home mode
- [18\-003\-26 REV A](/bulletins/11031448.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 \(DTCs\): ● \*\*P0300 \- Multiple Cylinder Misfire \(Active or Stored status set during cold start catalyst heating\). ● 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 \(Active or Stored status set during cold start catalyst heating\).\*\* ● P0032 \- O2 \- Sensor 1/1 Heater Circuit High. ● P0038 \- O2 \- Sensor 1/2 Heater Circuit High. ● P0052 \- O2 \- Sensor 2/1 Heater Circuit High. ● P0058 \- O2 \- Sensor 2/2 Heater Circuit High. ● P1129 \- Closed Loop Fueling Not Achieved\-Banks 2 Upstream. ● P0152 \- O2 Sensor 2/1 Circuit High. ● P0158 \- O2 Sensor 2/2 Circuit High. ● P2504 \- Charging System Output High. ● P0563 \- System Voltage High. ● 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. ● P0152\-02 \- O2 Sensor 2/1 Circuit High. ● P0158\-02 \- O2 Sensor 2/2 Circuit High. ● P2504 \- Charging System Output High. ● P0563 \- Battery/System Voltage High. Customers may also comment on one or more of the following: ● \*\*The vehicle has a rough idle. ● The engine has a miss or runs rough. ● Noisy valvetrain. M18 FSAR\-TSB\-7163 \-2\- ● "Service Transmission" message in the Instrument Panel Cluster \(IPC\) due to clutch slip detection with the transfer case in neutra
- [S2621000003 REV.A](/bulletins/11030138.md), 2026-03-18, Service bulletin: POWER TRAIN. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV, 8HP75\-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.

JSON: [/v1/bulletins/11027644](/v1/bulletins/11027644)

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