# Service bulletin CBR\-731 202409

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: 11008377
- Published by NHTSA: 2024\-10\-03
- Manufacturer's number: CBR\-731 202409
- Manufacturer's date: 2024\-09\-16
- NHTSA component: POWER TRAIN

## NHTSA's summary

CBR: Automated Manual Transmission \(AMT\) Model D or F \(mDrive and I\-Shift, AMT\-D, AMT\-F\) \- Transmission Oil Leakage From Transmission Input Shaft Seal Or Output Shaft Seal \- US10 And Newer Emissions, Common Model Years 2010 And Newer

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008377-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11008377-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2017 MACK ANTHEM \(AN\)
- 2018 to 2025 MACK ANTHEM \(AN\)
- 2019 to 2025 MACK GRANITE \(GR\)
- 2010 to 2016 MACK GRANITE \(GU\)
- 2017 to 2019 MACK GRANITE \(GU\)
- 2015 to 2025 MACK LR
- 2018 to 2024 MACK PINNACLE \(PI/PN\)
- 2025 MACK PIONEER PR \(4\)

## Recalls for the same vehicles and component

- [24V424000](/recalls/nhtsa/24V424000.md), 2024-06-09: POWER TRAIN:AXLE ASSEMBLY; STEERING:LINKAGES:TIE ROD ASSEMBLY
- [19V047000](/recalls/nhtsa/19V047000.md), 2019-01-21: POWER TRAIN:CLUTCH ASSEMBLY
- [2016495](/recalls/tc/2016495.md), 2016-10-11: Powertrain
- [16V099000](/recalls/nhtsa/16V099000.md), 2016-02-19: POWER TRAIN:DRIVELINE:DRIVESHAFT

## Other bulletins for the same vehicles and component

- [TSB M\-913\-001 202609](/bulletins/11037730.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Parker engine\-mounted hydraulic pump service bulletin.
- [GDC26\-001 202604](/bulletins/11032095.md), 2026-05-05, Over\-the\-air update: POWER TRAIN. GDC \- Transmission Oil Level Sensor
- [CBR 2573\-1 202604](/bulletins/11032092.md), 2026-05-05, Service bulletin: POWER TRAIN. CBR \- Mack Chassis \- Through Shaft Bearing Retainer Breakage On Mack Carriers.
- [CBR 2362\-3 202604](/bulletins/11032086.md), 2026-05-04, Service bulletin: POWER TRAIN. CBR \- Mack Carrier Nut Adhesive Change.
- [CBR 2218\-6 032026](/bulletins/11030582.md), 2026-04-02, Service bulletin: POWER TRAIN. CBR \- Parker F3 Hydraulic Pump Troubleshooting.
- [CBR 2482 072025](/bulletins/11021330.md), 2025-08-04, Service bulletin: POWER TRAIN. CBR \- Purpose of this CBR is to address Pop up message for PTO Malfunction when there is not PTO Installed.
- [S4558 202506](/bulletins/11020159.md), 2025-07-03, Service campaign: POWER TRAIN. Mack trucks has determined that certain model year 2021\-2024 PI models built with 4.19 rear axle ratios could experience elevated axle oil temps under high road speeds. To correct this issue the 4.19 ratio carriers need to be swapped to 3.79 ratio carriers. Follow the instructions below to replace both carriers with new ones.
- [CBR 2474\-1 202506](/bulletins/11019946.md), 2025-07-01, Service bulletin: POWER TRAIN. CBR \- This bulletin provides guidance for identifying and addressing oil intrusion related to the Countershaft Brake \(CSB\) in AMT\-G transmissions.
- [CBR 2464\-1 202505](/bulletins/11018816.md), 2025-06-02, Service bulletin: POWER TRAIN. Mack Chassis \- Rear Axle Overheat
- [S4088 202409](/bulletins/11008394.md), 2024-10-04, Service campaign: POWER TRAIN. Service Campaign: Interaxle Driveline Torque

JSON: [/v1/bulletins/11008377](/v1/bulletins/11008377)

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