Peterbilt will make powertrains with a TX-12 Pro automated transmission and Paccar MX-13 engine combination an option available to buyers of its 579, 567 and 589 tractors, the Paccar unit said ...

The global economy depends heavily on tractor-trailers to deliver goods ... which is used in Peterbilt model 567 and 579 ...

Peterbilt adds the PACCAR TX-12 Pro automated transmission for Models 579, 567, and 589, for vocational and on-highway use.