• The PACCAR powertrain offers an integrated solution for maximizing MPG and payload capacity
• It combines durable PACCAR MX engines and DX-40k tandem drive axles
• The integration of these components allows for effortless pulling, improved efficiency, enhanced fuel economy and increased driver comfort
• The PACCAR MX-13 and PACCAR MX-11 engines utilize a combination of proven technologies and state-of-the-art innovations
• These engines are designed to maximize MPG and achieve the lowest possible fuel consumption, emissions and noise levels
• They incorporate variable speed engine components and optimized combustion
• PACCAR MX engines deliver exceptional reliability and proven performance, whether in linehaul or vocational heavy-duty truck applications

Other powertrain highlights include:

• Gear ratio coverage for slow-speed maneuvering
• High-performance thru-shaft pinion design that transfers full engine power straight to the road
• Fuel system efficiently optimizes combustion and decreases noise
• Broad torque curve that delivers up to 1,850 lb.-ft. and peak torque at low rounds per minute (RPM)
• Long-life maintenance intervals

The new PACCAR TX-12 PRO automated transmission is designed to be versitile and efficient, while also remaining tough and durable. It is engineered to operate with engines that have up to 1,000 lbs.-ft. of torque and a maximum Gross Combination Weight Rating (GCWR) of 70,000 lbs. 

More TX-12 Pro Features and Benefits include:

• Dual PTO functionality to power multiple hydraulic devices simultaneously
• New Extreme Duty Clutch for improved low-speed maneuvering with higher loads
• Rock Free Mode helps rock the truck free from mud, sand or snow
• Off-Highway Calibration enables shift points that are tuned for changing off-highway conditions with a bias toward shifting less often
• Secondary Configuration for a tailored driving experience that accounts for toggling between two calibrations for the load or terrain

• The Model 579 offers the most advanced aerodynamic features and packages to improve fuel economy
• The bold grille and bumper maximize aerodynamic performance, while the lower-sitting front end enhances visibility of the ground in front of the truck
• The air dam below the bumper further improves aerodynamics without compromising ground clearance
• Sculpted mirror heads and arms not only improve aerodynamic efficiency but also allow the driver to see the top of the trailer while backing up
• The A-pillar fairing directs air across the side of the cab to improve aerodynamics, reduce noise and enhance driver comfort
• Wheel well closeouts accommodate a wider range of tire options
• Tip-out chassis fairings provide convenient tool-free access to batteries, fuel tanks, auxiliary power units (APUs) and after-treatment systems
• The Model 579 features industry-leading Light Emitting Diode (LED) headlamps with superior light coverage, uniformity and a built-in heater for clear lenses in inclement weather
• An optional LED fog, driving and directional light system enhances visibility in different weather and road conditions by improving high-beam output and automatically activating a cornering light with the turn signal

Cab

• Engine enhancements such as smoother operation, crank-mounted fan, engine-mounted air cleaner and acoustically tuned engine mounts improve the driving experience
• Trim levels feature dark dash and door pad uppers for reduced glare
• The spacious interior includes larger panel switches, large cupholders with storage, a new smart steering wheel with audio/phone and cruise controls, dual USB chargers and LED lighting
• The 15-inch digital display is the largest in the industry, providing easy-to-use features and a configurable interface

Sleeper

• The interior of the new Model 579 sleeper provides home-like comfort
• The 80-inch UltraLoft sleeper offers 8 feet of headroom, 70 cu. ft. of storage and the largest mattresses in the industry
• It can accommodate up to a 32-inch TV and a 1.1 cubic-foot microwave, both the largest in their class
• In the double bunk configuration, a foldaway ladder conveniently disappears when not in use
• Sleeper features include sound abatement technology, independent HVAC with separate controls, optional fuel-fired heater and multiple no-idle hoteling options