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Mack technical service bulletin S4574 072025 for 2026 Mack Anthem (An) and 2026 Mack Granite GR (4).
- Bulletin number
- S4574 072025
- Component
- Power train
- Summary
- SC - Mack Trucks has identified that certain truck models may have been assembled with incorrectly torqued interaxle prop shaft U-joint hardware.
Vehicles covered
- Mack Anthem (An) 2026 2026
- Mack Granite GR (4) 2026 2026
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