Kenworth makes T680 available with Paccar engine, automated transmission combo

SD Staff

March 14, 2018

Paccar EngineKenworth Truck Company announced Wednesday its T680 on-highway flagship is now available for order for the first time with the combination of the Paccar MX-11 engine and the new Paccar automated transmission, which is designed for linehaul and regional haul applications up to 110,000 lb. gross vehicle weight.

According to the company, the Paccar MX-11 engine offers up to 430 hp and 1,650 lb.-ft. of torque, and is 400 lb. lighter than 13-liter engines. Designed from the ground up, the Paccar transmission also is up to 105 lb. lighter than comparable transmissions, Kenworth says allowing for greater payloads and the best overall gear ratio coverage available, which results in excellent low-speed maneuverability.

“The proprietary Paccar powertrain, which includes Paccar’s 10.8-liter MX-11 engine, 12-speed transmission and 40,000-lb. tandem rear axle, provides outstanding performance through weight savings, increased fuel efficiency and enhanced driveability for Kenworth T680s operating in linehaul and regional haul applications,” says Kurt Swihart, Kenworth marketing director.


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In addition to performance advantages, the new Paccar automated transmission also features extended maintenance, with a 750,000-mile oil change interval the company says is the longest available for linehaul applications. The clutch is maintenance-free and features an internally routed electrical system that minimizes exposure to the elements. The fluid pressure detection system, which protects the gears from low fluid conditions, also allows Kenworth to offer industry-leading warranty coverage, the company says.

The Paccar transmission is paired with Kenworth’s new column-mounted shifter, putting gear selection and engine brake controls at the driver’s fingertips for better ergonomics and improved performance. The shifter position on the steering wheel column also frees up dash space by eliminating engine brake control switches, the company says.

The 12-speed Paccar automated transmission is also available with the Paccar MX-13 engine rated up to 510 hp and 1,850 lb.-ft. of torque and Paccar tandem rear axles to maximize Paccar powertrain efficiency and driveability.

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