Direct drive transmissions are well suited to relatively flat on-highway applications. Photo: Eaton The long-running debate over which type of transmission — direct drive or overdrive — provides the ...

Direct drive or overdrive? That’s a years-old question among truck operators concerned with spec’ing transmissions: Should top gear be a direct 1 to 1 ratio, where the output shaft spins at the same ...

The ISX15 SmartAdvantage Powertrain is the only integrated powertrain in the industry to offer both small-step overdrive and direct drive options. Understanding the difference between the two ...

Mack Trucks Thursday at the Mid America Trucking Show in Louisville introduced a Super Econodyne rating for the direct drive version of its mDRIVE automated manual transmission (AMT). Previously the ...

Since the health of our planet became a major societal focus decades ago, automotive engineers have been on a mission to find a balance between performance and efficiency. In the past, the two ...