Two new Paccar automatic transmissions are available in Kenworth and Peterbilt Class 8 heavy trucks, included select vocational applications.
The TX-18 offers additional capability for heavy on-highway use for applications, such as heavy haul transport. The TX-18 Pro adds enhanced capabilities and unique features for extreme duty vocational applications and other select off-highway applications.
The new transmissions are available with the Kenworth T680, T880 and W990 heavy trucks, and Peterbilt 567, 389, and 579 models. Transmissions are paired with Paccar MX-13 and Paccar MX-11 engines. The TX-18 and TX-18 Pro transmissions maximize the full potential of all MX engine ratings, according to the company, with maximums of 510 horsepower; 1,850 lb.-ft. of torque capacity; and 140,000 pounds of gross combination vehicle weight (GCVW).
The 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 horsepower capacity at 1,400 rpm.
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.
Source: Kenworth and Peterbilt
