Direct drive – the invisible transmission. Nov. 1, 2000. When it comes to linking motors and loads, there's nothing simpler and more efficient than "direct drive" ...

The long-running debate over which type of transmission — direct drive or overdrive — provides the greatest efficiency is one that’s not easily settled and not likely to go away.

Even more spectacular than this unprecedented hybrid powertrain is the revolutionary Koenigsegg Direct Drive (KDD) transmission system, invented by none other than Christian von Koenigsegg himself ...

But the Advantage design could be applied to direct-drive 10-speeds, and possibly to multi-speed transmissions. Meanwhile, more direct-drive top-gear models are being sold as some trucking ...

The technology isn’t presently aimed at the direct-drive challenge, rather at allowing 40,000-pound axles to be used with engines in the 565- and 600-horsepower range. With an 18-speed Eaton Fuller ...

With a direct-drive transmission design, the input and output shafts spin at the same rate in top gear, passing torque from the engine straight through the transmission. Overdrive uses an extra set of ...

The direct-drive transmission is gaining acceptance because of its high gear ratio, which is the cruising gear, and has a direct path for the engine torque through the transmission.

Continuously variable automatic transmissions, or CVTs, ... And some aren’t CVTs at all, such as the direct-drive setup in modern Honda hybrids, which is incorrectly labeled a CVT ...