2024
Peterbilt Model 579 Ultra Loft
The Peterbilt 579 Ultra Loft pairs the aerodynamic efficiency of modern truck design with a 40-inch raised roof sleeper providing 2.0 m standing height. The PACCAR MX-13 engine and SmartNav in-dash infotainment give it the technology package demanded by modern fleets.
Long-Haul Class 8
Shared Parts
Allison 3000 RDS Automatic Transmission
Allison Transmission Inc.
Cummins ISX15 Engine
Cummins Inc.
PACCAR MX-13 Engine
PACCAR Inc.
Meritor RT-46-160 Tandem Drive Axle
Meritor Inc.
Hendrickson PRIMAAX EX Rear Suspension
Hendrickson International
Cummins X15 Diesel Engine
Cummins Inc.
PACCAR MX-13 Diesel Engine
PACCAR Inc.
SAF-Holland FW35 5th Wheel Coupling
SAF-Holland SE
Hendrickson Intraax AAL Tandem Suspension
Hendrickson International
Technical Specifications
| Engine | PACCAR MX-13, 12.9L Inline-6 |
| Horsepower | 510 hp @ 1,500–1,900 rpm |
| Torque | 2,508 Nm @ 950–1,300 rpm |
| Transmission | PACCAR TX-12 Automated |
| Drivetrain | 6×4 |
| GVWR | 36,287 kg GCW |
|---|---|
| Payload | Up to 20,000 kg |
| Fuel Type | Diesel |
| Range / Tank | Up to 2×450 L |
| Emissions | CARB / EPA 2010 |
| Sleeper | 40" Raised Roof Ultra Loft |
| MSRP Range | $180,000–$220,000 |