# Service bulletin S7644

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: 10225627
- Published by NHTSA: 2022\-11\-03
- Manufacturer's number: S7644
- Manufacturer's date: 2022\-10\-24
- NHTSA component: POWER TRAIN; ENGINE AND ENGINE COOLING

## NHTSA's summary

13L Oil Pickup Replacement

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10225627-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10225627-9999.pdf)

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

## Components

Engine, Transmission and driveline

## Vehicles listed

- 2022 MACK ANTHEM \(AN\)
- 2022 MACK GRANITE \(GR\)
- 2022 MACK PINNACLE \(PI/PN\)
- 2022 MACK TERRAPRO \(TE\)

## Recalls for the same vehicles and component

- [2026108](/recalls/tc/2026108.md), 2026-03-11: Powertrain
- [26V139000](/recalls/nhtsa/26V139000.md), 2026-03-11: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE

## 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.
- [M0039 032026](/bulletins/11030590.md), 2026-04-02, Emissions: ENGINE. Emissions \- EC0039 MST21 Failure to Detect P20EE \- AN, CHU.
- [CBR 2128\-7 202601](/bulletins/11028033.md), 2026-02-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. CBR \- Engine Control Module \(EMS\) Software Information \- Improvement List \(Change Log\), US21\+OBD2021 Emissions ONLY
- [CBR 2107\-22 202601](/bulletins/11028032.md), 2026-02-02, Service bulletin: ENGINE. CBR \- Mack DEF Level \(UQLS\) Sensor Troubleshooting Guide \- US17\+OBD16 Emissions to US22\+OBD2023 \(DOES NOT APPLY TO AN\(4\) and PR\(4\)\).
- [CBR 199 202512](/bulletins/11027007.md), 2026-01-05, Service bulletin: ENGINE. Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
- [CBR 2171\-11 202511](/bulletins/11026025.md), 2025-12-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. CBR \- Mack Temperature Sensor Troubleshooting Guide
- [CBR 199\-6 202511](/bulletins/11026021.md), 2025-12-03, Service bulletin: ENGINE. CBR \- 13 Liter Engines ONLY \- Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.
- [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.

JSON: [/v1/bulletins/10225627](/v1/bulletins/10225627)

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