Downspeeding saves fuel, and with aerodynamics and tires continuing to improve, truck manufacturers are experimenting with still lower rear axle ratios. I recently took a ride in a Mack Anthem with an ...

Meritor, Inc. had added two axle ratios, which it said are optimized for increased fuel efficiency, to its 14X rear-drive axle portfolio. Meritor’s 14X tandem drive axles with a 2.79 ratio will be ...

Dana’s Test & Evaluation truck, a Kenworth T700 with a Cummins ISX15 at 450 hp and 1,650 lb-ft, and an Eaton 10-speed UltraShift Plus transmission. Photos: Jim Park Fortunately, it’s easier to ...

Not a week goes by that I don't get a question about the right vehicle with which to tow a trailer. This is one of two common problems I hear all the time: My pickup gets horrible fuel economy. My ...

Optional axle ratios can tailor pickup truck power and efficiency to suit your needs as long as the gearing keeps the engine in its torque sweet spot. Often overlooked, optional gear ratios play a key ...

The latest Confidence Report released by the North American Council for Freight Efficiency and Carbon War Room reveals that downsped drivelines in Class 8 tractors can produce fuel savings of 2-3% ...