Paccar’s new AMTs now available in Kenworth on-highway, vocational applications


Paccar's TX-18 transmission

Kenworth announced Monday the new Paccar TX-18 and Paccar TX-18 Pro automated transmissions for Class 8 heavy on-highway and select off-highway vocational applications are now available for order.

Both 18-speed transmissions build upon the efficiency of the Paccar TX-12, which was designed to be the most efficient on-highway automated transmission. Kenworth says the Paccar TX-18 offers additional capability for heavy on-highway use for applications, such as heavy haul transport. The Paccar TX-18 Pro adds enhanced capabilities and unique features for extreme duty vocational applications and other select off-highway applications, the company adds.

The new transmissions are available with the Kenworth T680, T880 and W990 equipped with the Paccar MX-13 and Paccar MX-11 engines. Optimally engineered to operate with the Paccar MX engine platform, the new TX-18 and TX-18 Pro transmissions support maximums of 510 horsepower, 1,850 lb.-ft., of torque capacity and 140,000 lb., of gross combination vehicle weight (GCVW), Kenworth says.

Additionally, the company adds the new 18-speed ratio provides smooth shifting and consistent performance in a wide range of operating applications. The TX-18 has three reverse gears, and TX-18 Pro has six, which pairs well with deep axle ratios. Multiple reverse gears allow for improved maneuverability around job sites. Both transmissions offer expanded high-capacity PTO functionality with an 8-bolt bottom mount and 4-bolt rear mount for a combined 160 hp capacity at 1,400 RPM.

The transmissions also are equipped with an internal oil temperature sensor. The sensor shows transmission temperatures on the in-cab 15-in., digital display and provides driver notifications in situations causing excessive temperatures. 

The TX-18 and TX-18 Pro are standard with Kenworth’s driver-friendly column-mounted, right-hand shifter. The shifter places gear selection and engine brake controls at the driver’s fingertips for enhanced ergonomics, comfort and overall performance. 

On-highway maintenance intervals are 500,000 miles or five years, and vocational intervals are 250,000 miles or three years for the TX-18 and TX-18 Pro. The transmissions utilize a maintenance-free clutch, Kenworth says.



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