Technical Service Bulletin S4579 092025 — 2026 MACK ANTHEM (AN)
POWER TRAIN
Bulletin Details
| TSB ID | S4579 092025 |
| Manufacturer | |
| Vehicle | 2026 MACK ANTHEM (AN) |
| Component | POWER TRAIN |
| Communication Date |
Bulletin 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.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2026 MACK ANTHEM (AN)
S4579 092025
UNKNOWN OR OTHER
S4574 072025
POWER TRAIN
S4578 072025
UNKNOWN OR OTHER
S4578 072025
STRUCTURE:BODY