So here's the deal. A technology company called Torotrak has developed a revolutionary automatic transmission system for automotive applications that yields a substantial fuel economy improvement - and corresponding CO2 emissions reduction - over standard stepped ratio manual and automatic transmissions. Torotrak is licensing the technology out and there is significant interest and evaluation work from OEMs and Tier 1 transmission makers, but no-one has yet announced plans for volume production. What happens next? Dave Leggett reports.