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Published on May 12, 2010
This brain-bending invention could be the holy grail of transmission technology - it allows you to smoothly move through gear ratios from top gear all the way through neutral and into reverse without ever disengaging the engine. Plus, there's no friction drive component, so the power is always transmitted through gear teeth - there's never any slip or friction losses.
In fact, the D-Drive's main difficulty is that it's so damn hard to understand that people don't really know what to do with it. So here's a close-up look, which will hopefully get a few people thinking.