The Paccar TX-12 Pro automated transmission is now available with the Paccar MX-13 engine for Kenworth’s T680, T880, and W990 models. This transmission is designed to optimize performance for both on- ...

Paccar's low NOx MX-13 engine is available in Peterbilt Models 579, 567, and 589 trucks, and Kenworth's T680, T880, and W990 trucks. The engine meets CARB regulations with redesigned internal ...

The PACCAR MX-13 is rated up to 500 hp and is the only 13-liter class engine rated up to 1,850 lb-ft of torque. It is available for Kenworth Class 8 models, including the T660, T680, T700, T800 ...

The 2021 Paccar MX-11 and Paccar MX-13 engines for Kenworth’s Class 8 truck lineup feature re-designed internal components to enhance fuel economy.