It's the unit from the ST220:
Quote:
lightweight Durashift six-speed manual transmission, a completely new development from Ford-Getrag based on a three-shaft design with one input and two output shafts. It has two layshafts with the most commonly used gears ââ?¬â?? first to fourth ââ?¬â?? on one with dual synchros and fifth, sixth and reverse on the second layshaft, using a different final drive ratio.
This gives you the best of both worlds, with four short, closely-spaced ratios for hard acceleration and quick work around town and two longer-legged gears for better fuel economy on the open road.
It's similar in effect (although not in operation) to the old British Laycock de Normanville transmission, which gave you an electrically operated overdrive on third and fourth.
It's a lot slicker in operation, however, thanks to a counterbalance that reduces the synchroniser ring resistance felt during gear shifting. The shifting process therefore becomes smoother. The three-shaft layout allows a very compact transmission; the gearbox and clutch assembly weighs only 52kg.
I'm pretty impressed at the 52kg weight for the gearbox & clutch assembly. That's just under 115 lbs. 
