Dana's Spicer AdvanTEK 40 tandem axle, a 40,000-lb tandem axle for a variety of Class 8 applications, features a design that increases fuel economy, improves reliability, reduces vehicle weight and decreases total ownership costs. A combination of features including the industry's fastest axle ratio of 2.26:1, lower axle weight, optimum inter-axle driveline angles and reduced lubrication quantity will save fleets money on fuel and maintenance, according to the comnpany. Its faster axle ratios handle higher input torques, lower engine rpm at cruise speed while increasing axle efficiency by up to 1.2 percent and suit direct-drive transmission drivetrains requiring rear axle ratios from 2.26 to 2.79 and overdrive transmission drivetrain ratios from 2.93 to 3.91.