Dana’s Spicer Pro-40 tandem axle is now offered in the 2013 Kenworth and Peterbilt data books, having previously been available only by specific request. These 40,000-lb drive axles supplies offer a dramatic weight reduction and improved power density, says Dana. The axle is said to be nearly 100 lb lighter than the nearest competition, and now offers a new thinner-wall version for further weight reductions on select applications.

Available with ratios from 3.25 to 3.90, the Pro-40 is suited to nine-, 10-, 12-, or 13-speed overdrive transmissions; diesel engines rated up to 475 hp and 1750 lb ft of torque; and gross combination weight ratings up to 80,000 lb.