Peterbilt Announces TX-12 AMT Option for PX-9 Engines
When paired with the Paccar TX-12 automated manual transmission, the PX-9 diesel engine PX-9 engine produces up to 1,250 lbs.-ft. of torque with a maximum gross combination weight rating (GCWR) of 66,000 pounds for pickup and delivery and other tractor applications.

The Paccar TX-12 automated transmission was designed to emphasis light weight and robust construction.
Photo: Peterbilt
Peterbilt has announced the availability of Paccar TX-12 automated transmissions with Paccar PX-9 engines. The spec is for Peterbilt medium duty Models 548, 537 and 536.
Peterbilt said both the standard Paccar TX-12 and TX-12 Pro are designed to “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.”
Versatility and Efficiency
Designed to be one of the most efficient on-highway transmissions, the TX-12 features light weight 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 pickup and delivery and other tractor applications.

The Paccar TX-12 Pro builds on the basic TX-12 automated transmission platform -- but is designed for more rugged applications.
Photo: Peterbilt
According to Peterbilt, 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.
More Equipment

Atlas Expands Kodiak Driverless Truck Fleet in Permian Basin
Atlas Energy Solutions is expanding autonomous frac sand hauling in the Permian Basin with a second load-out location and plans for 100 driverless trucks by mid-2027.
Read More →
Putting Mack’s Command Steer to the Test
A test drive of Mack’s Command Steer active steering system evaluates how it can make truck driving easier and less tiring.
Read More →
Mack, Volvo Expand DEF Derate Software Updates
The updated software gives Mack and Volvo truck owners more time to address DEF-related issues before the engine derates or the vehicle goes into reduced-speed inducement, following new EPA guidance.
Read More →
Rush, MCT Team Up to Grow Refrigeration Service Network
The joint venture will operate MCT's network of Carrier Transicold dealerships and mobile service locations, with the companies promising greater service capacity and uptime for refrigerated fleets.
Read More →
Cummins Adjusts 2027 Engine Rollout After EPA Proposal
The engine maker will gradually introduce its new Model Year 2027 diesel engines while continuing to offer current models during the transition, citing the EPA's proposed emissions rule changes.
Read More →
Aurora Rolls Out Next Generation of Driverless Trucks for Commercial Freight
Aurora's latest autonomous trucks it's rolling out with International feature lower-cost hardware designed for a million miles as the company expands commercial driverless freight operations across the U.S. Sun Belt.
Read More →
Peterbilt 589 Spotlight: A Close Look at a Custom Working Truck [Video]
There's more to this customized Peterbilt Model 589 and Great Dane refrigerated trailer than chrome and stainless (although there's plenty of that too!) A veteran driver explains the design choices and practical features behind this working truck.
Read More →
Continental Expands Retread Lineup With New ContiTread HDL 5 EP
New long-haul drive retread is designed to improve fuel efficiency, extend tread life, and lower fleets' cost per mile.
Read More →
EPA Proposal Could Ease 2027 Truck Costs and Buying Uncertainty
The proposal doesn't change the tougher NOx standard, but it would revise key implementation requirements that manufacturers say have driven up costs and complicated fleet purchasing decisions.
Read More →
Cummins, Paccar Ease DEF Derates After EPA Guidance
Updated diesel engine software gives truck operators more time to address emissions-system issues while staying compliant with EPA emissions standards.
Read More →
