Peterbilt Expands PACCAR TX-18 Pro Transmission

Last Updated: September 21, 2026By

Selecting proper gear ratios for heavy vocational trucks usually forces tough compromises on fleet spec writers. In fact, severe-duty dump trucks require low-end crawling power alongside smooth highway cruising speeds. Peterbilt Motors Company recently highlighted performance gains from its PACCAR TX-18 Pro automated transmission. Specifically, vocational fleets are replacing older automatic boxes with this 18-speed automated transmission to boost efficiency. You can review official equipment specifications directly on the Peterbilt press releases page.

Traditional fully automatic transmissions feature heavy torque converters that consume extra fuel during daily operation. However, automated manual transmissions use internal clutches to eliminate heavy hydraulic fluid pumps. Furthermore, the TX-18 Pro unit weighs over four hundred pounds lighter than legacy automatic models. Reducing overall vehicle weight converts directly into four hundred extra pounds of legal payload capacity. As a result, your haulers transport more material on every single vocational run.

Improving Vocational Driver Precision

Navigating crowded construction sites or muddy dirt pits demands exceptional low-speed control from heavy equipment drivers. Consequently, the 18-speed gearbox offers extended ratio coverage with multiple extreme low gear ratios. Drivers can slow down for tight loading spots or accelerate smoothly when road conditions open up. The system also includes multiple reverse gears for precise backing maneuvers on tight jobsites.

In addition, automated shifting reduces physical driver fatigue during long shifts in heavy city traffic. Automated clutch management eliminates repetitive clutch pedal pressing for new and experienced drivers alike. Therefore, your drivers remain more focused on surrounding jobsite hazards and pedestrian traffic. Fewer shifting distractions ultimately translate into safer daily operations across your entire vocational fleet.

Boosting Overall Fleet Fuel Efficiency

Fuel costs continuously represent one of the largest controllable expenses for commercial fleet operations. Fortunately, smart electronic controls select the optimal engine gear based on vehicle weight and grade. Optimal gear selection prevents unnecessary engine revving while climbing steep highway hills with heavy cargo loads.

Lower engine operating speeds save valuable gallons of diesel fuel over long regional delivery routes. Meanwhile, built-in predictive shifting technology anticipates upcoming road terrain using high-definition terrain mapping. Consequently, the truck maintains momentum without consuming excess fuel during highway climbs. Selecting modern automated transmissions ultimately protects your operating budget while satisfying driver preferences daily.

Also read: Fuel Efficiency in a Volatile Market: Why Fleets Should Watch Samsara’s Latest Webinar