Peterbilt said Paccar TX-12 automated transmissions with Paccar PX-9 engines will be available for medium-duty Models 548, 537, and 536. Both the standard Paccar TX-12 and TX-12 Pro versions seamlessly integrate with the PX-9, offering efficient operation and superior drivability.

“Together, the TX-12 transmissions and PX-9 engine, create an exceptional combination of efficiency and reliability,” said Jake Montero, assistant general manager, sales and marketing for Peterbilt. “Our medium-duty customers can spec confidently knowing this new powertrain configuration delivers increased productivity and an excellent driving experience.”

Paccar TX-12 Efficient for On-Highway Tasks

Designed to be one of the most efficient on-highway transmissions, the TX-12 features lightweight and robust construction. Combined with the PX-9 engine, it operates up to 1,250 lbs.-ft. of torque with a maximum gross combination weight rating (GCWR) of 66,000 pounds for pick-up and delivery and other tractor applications.

Paccar TX-12 Pro Ready for Rugged Work

The TX-12 Pro builds on the TX-12 foundation with increased versatility and efficiency for more rugged applications. Operating with the PX-9 engine, the TX-12 Pro supports up to 1,250 lbs.-ft. of torque and a maximum gross combination weight rating (GCWR) of 66,000 pounds supporting vocational applications such as snowplows, cranes, bucket/boom trucks, and more.