# Service bulletin CBR 2474\-1 202506

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: 11019946
- Published by NHTSA: 2025\-07\-01
- Manufacturer's number: CBR 2474\-1 202506
- Manufacturer's date: 2025\-06\-04
- NHTSA component: POWER TRAIN

## NHTSA's summary

CBR \- This bulletin provides guidance for identifying and addressing oil intrusion related to the Countershaft Brake \(CSB\) in AMT\-G transmissions.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11019946-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11019946-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 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

## Other bulletins for the same vehicles and component

- [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 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.
- [S4088 202409](/bulletins/11008394.md), 2024-10-04, Service campaign: POWER TRAIN. Service Campaign: Interaxle Driveline Torque
- [CBR\-2387 202409](/bulletins/11008382.md), 2024-10-04, Service bulletin: POWER TRAIN. CBR: Vehicles Equipped With A Lift Axle \- Wheel Speed Fault Code SPN 793, SPN 794 Set When Axle Is Up
- [CBR\-731 202409](/bulletins/11008377.md), 2024-10-03, Service bulletin: POWER TRAIN. 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
- [CBR\-343 202408](/bulletins/11006923.md), 2024-09-04, Service bulletin: POWER TRAIN. CBR: Mack chassis with an mDRIVE transmission, there have been reports of complete shift assemblies and TECUs being replaced due to technicians being unable to pinpoint the source of the air leak.
- [S0488 202407](/bulletins/11005416.md), 2024-08-01, Service campaign: POWER TRAIN. Service Campaign: Interaxle Driveline Torque
- [CBR\-1008 202404](/bulletins/10253804.md), 2024-05-01, Service bulletin: POWER TRAIN. CBR: Equipped With An Automated Manual Transmission Model D or F \( AMT\-D, AMT\-F, mDrive\) Missing X1 Value In VDA And Default Settings Guidelines, ParameterP1AOB; Fault Code P1052\-54, Error 40,Or Error 18 Encountered During Clutch Or Tran.

JSON: [/v1/bulletins/11019946](/v1/bulletins/11019946)

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