# Service bulletin KC\-2229\-Ver2

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: 10237348
- Published by NHTSA: 2023\-06\-05
- Manufacturer's number: KC\-2229\-Ver2
- Manufacturer's date: 2023\-05\-10
- NHTSA component: POWER TRAIN

## NHTSA's summary

CBR: Automated Manual Transmission \(AMT\) Transmission Kickdown Mode

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237348-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237348-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2016 to 2017 MACK ANTHEM \(AN\)
- 2018 to 2024 MACK ANTHEM \(AN\)
- 2014 to 2018 MACK CHU
- 2014 to 2018 MACK CXU
- 2015 to 2016 MACK GRANITE \(GR\)
- 2017 to 2024 MACK GRANITE \(GR\)
- 2014 to 2016 MACK GRANITE \(GU\)
- 2017 to 2023 MACK GRANITE \(GU\)
- 2014 to 2018 MACK GU
- 2014 to 2017 MACK LEU
- 2014 MACK LR
- 2015 to 2024 MACK LR
- 2014 to 2018 MACK MRU
- 2014 to 2016 MACK PINNACLE \(CHU\)
- 2017 to 2022 MACK PINNACLE \(CHU\)
- 2014 to 2016 MACK PINNACLE \(CXU\)
- 2017 to 2022 MACK PINNACLE \(CXU\)
- 2018 to 2024 MACK PINNACLE \(PI/PN\)
- 2014 to 2019 MACK TD
- 2019 to 2021 MACK TE
- 2014 to 2016 MACK TERRAPRO \(LEU\)
- 2014 to 2016 MACK TERRAPRO \(LEU/MRU\)
- 2017 to 2019 MACK TERRAPRO \(LEU/MRU\)
- 2014 to 2016 MACK TERRAPRO \(MRU\)
- 2017 to 2024 MACK TERRAPRO \(MRU\)
- 2017 to 2018 MACK TERRAPRO \(TE\)
- 2022 to 2024 MACK TERRAPRO \(TE\)
- 2014 to 2015 MACK TITAN
- 2014 to 2018 MACK TITAN \(TD\)

## Recalls for the same vehicles and component

- [2026108](/recalls/tc/2026108.md), 2026-03-11: Powertrain
- [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.
- [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.
- [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 2464\-1 202505](/bulletins/11018816.md), 2025-06-02, Service bulletin: POWER TRAIN. Mack Chassis \- Rear Axle Overheat
- [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\-2258 202409](/bulletins/11008379.md), 2024-10-03, Service bulletin: POWER TRAIN. CBR: Diagnostic Trouble Code \(DTC\) P107471 \- AMT\-F
- [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\-2391 202408](/bulletins/11006927.md), 2024-09-04, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. CBR: Diagnostic Trouble Code \(DTC\) U010187\- Lost Communication With TECU

JSON: [/v1/bulletins/10237348](/v1/bulletins/10237348)

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