Service campaign S4579 092025
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 campaign |
|---|---|
| NHTSA id | 11023461 |
| Published by NHTSA | 2025-10-01 |
| Manufacturer's number | S4579 092025 |
| Manufacturer's date | 2025-09-01 |
| NHTSA component | UNKNOWN OR OTHER; POWER TRAIN |
NHTSA's summary
Mack Trucks has identified that certain truck models may have been assembled with incorrect center bearing mounting hardware and could have been torqued incorrectly. Improper torque can increase the risk of hardware failure. To address this issue, please follow the instructions in this document to replace and correctly torque the center bearing and center bearing mounting bracket hardware.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Transmission and driveline
| MACK ANTHEM (AN) | 2026 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| MACK GRANITE (GR) | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| MACK PINNACLE (PI/PN) | 2026 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| TSB M-913-001 202609 | 2026-10-02. Service bulletin. Parker engine-mounted hydraulic pump service bulletin. |
|---|---|
| GDC26-001 202604 | 2026-05-05. Over-the-air update. GDC - Transmission Oil Level Sensor |
| CBR 2573-1 202604 | 2026-05-05. Service bulletin. CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers. |
| CBR 2362-3 202604 | 2026-05-04. Service bulletin. CBR - Mack Carrier Nut Adhesive Change. |
| CBR 2218-6 032026 | 2026-04-02. Service bulletin. CBR - Parker F3 Hydraulic Pump Troubleshooting. |
| S4574 072025 | 2025-08-04. Service campaign. SC - Mack Trucks has identified that certain truck models may have been assembled with incorrectly torqued interaxle prop shaft U-joint hardware. |
| CBR 2464-1 202505 | 2025-06-02. Service bulletin. Mack Chassis - Rear Axle Overheat |