UnparalLeled Comfort
The Model 579 UltraLoft offers the ultimate environment for driving, living and working. The high-quality interior is created from soft-touch materials and features a superb fit and finish for an outstanding driver experience. Headroom is exceptional, with an interior height of over eight feet.
The Model 579 UltraLoft interior offers the largest storage capacity available in the industry, with more than 70 cubic feet of space with multiple compartments, a large wardrobe closet and several cubbies.
A cleverly designed fold-away ladder provides ease of access to the upper bunk and disappears when not in use.
The interior also features the comforts of home, such as space for appliances, entertainment options, power outlets and other special touches that make the Model 579 UltraLoft the preferred choice of drivers.
all about aerodynamics.
The UltraLoft sleeper not only looks sleek, but it provides a 200-lb. weight savings and up to a 2% aerodynamic enhancement over Peterbilt’s discrete sleepers, equating up to a 1% fuel efficiency improvement to your bottom line. The UltraLoft is standard with a driver’s side window and a flush baggage door, with an optional full-height flush sleeper-access door available, for improved aerodynamics. Large upper windows with a tilt feature are included, allowing ambient light to fill the sleeper.
Choose the ENGINE that’s right for you
The 12.9-liter PACCAR MX-13 and Cummins X15 engines are available options for your Ultraloft. Choose the right power plant to drive your business forward.
Select a Cummins X15 engine for your Ultraloft 579
Choose from one of two Paccar power plants
TRANSMISSION
PACCAR’s 12-speed automated transmission was designed from the ground up to work seamlessly with PACCAR MX engines and axles. The purpose-built automated transmission represents a major advancement in powertrain performance, productivity, efficiency, driveability and return on investment.
Lightest 1,850 lb.-ft. torque-capable heavy-duty automated transmission system on the market
Smooth and intuitive shift strategies to improve fuel economy and driver comfort
Deepest reverse ratio among linehaul transmissions for slow-speed maneuvering
Longest transmission oil change interval for linehaul applications
Requires only half as much oil – 16 pints – as comparable automated transmissions
Industry-exclusive Fluid Pressure Sensor notifies the driver of low oil to prevent gear burn-up