# Service bulletin KC\-2273\-Rev6

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: 10237336
- Published by NHTSA: 2023\-06\-05
- Manufacturer's number: KC\-2273\-Rev6
- Manufacturer's date: 2023\-05\-02
- NHTSA component: WHEELS; SUSPENSION; POWER TRAIN

## NHTSA's summary

CBR: Pre\-Delivery Inspection \(PDI\) Torque Values. This is to help with the torque specs needed to complete a Pre\- Delivery Inspection \(PDI\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237336-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237336-9999.pdf)

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

## Components

Suspension, Transmission and driveline, Wheels

## Vehicles listed

- 2024 MACK ANTHEM \(AN\)
- 2024 MACK GRANITE \(GR\)
- 2024 MACK LR
- 2024 MACK MD
- 2024 MACK PINNACLE \(PI/PN\)
- 2024 MACK TERRAPRO \(TE\)

## Recalls for the same vehicles and component

- [2026108](/recalls/tc/2026108.md), 2026-03-11: Powertrain

## 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 2595 072026](/bulletins/11035505.md), 2026-08-03, Service bulletin: WHEELS; SEATS. CBR \- The purpose of this CBR is to provide information on 2010 and newer Mack Granite chassis experiencing a low frequency vibration.
- [SC S4920 202604](/bulletins/11032096.md), 2026-05-05, Service campaign: SUSPENSION. SC \- Trunion Nut Pinch Bolt.
- [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.
- [TSB M\-432\-002A 032026](/bulletins/11030591.md), 2026-04-02, Service bulletin: POWER TRAIN. TSB \- Cable, Gear Selector, Replacement
- [CBR 2246\-5 032026](/bulletins/11030583.md), 2026-04-02, Service bulletin: SUSPENSION. CBR \- Z Spring Bracket Wear.
- [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

JSON: [/v1/bulletins/10237336](/v1/bulletins/10237336)

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