Buzzing noise after engine stop

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Extract from Promotional Material before the launch of the MC Mondeo (Ford of Europe)

Ford PowerShift: Easy and Efficient

Ford PowerShift (6DCT450) is standard equipment on new Mondeo with either the 203 or 240 PS 2.0-litre EcoBoost engine – creating an advanced combination that delivers new levels of fuel efficiency and low CO2, yet still demonstrates that driving pleasure does not need to result in high CO2 emission levels. Ford PowerShift is also optional with 140 and 163 PS versions of the 2.0-litre Duratorq TDCi common rail turbo-diesel engine.
Developed by Getrag Ford Transmissions GmbH as a 50:50 Ford and GETRAG joint venture, the Ford Powershift transmission consists of two layshaft transmissions working in parallel, each with its own wet-clutch unit.
Thanks to the layout of the intermediate shafts – one carrying the 'uneven' gears 1, 3 and 5, and the other the 'even' gears 2, 4 and 6 – subsequent gear changes can be prepared by pre-selecting the next gear while in motion and at full power. The change then takes place through the opposed activation of both clutches, this being co-ordinated to avoid torque interruption.
In contrast to conventional automatic transmissions, the basic technical configuration of the Ford PowerShift transmission offers numerous advantages. It does not, for instance, require any complex sub-systems such as torque converters, planetary gear sets, multiple wet-clutches and multiple bands – all of which significantly reduce gearbox efficiency through increased inertia and drag torque effects.

Homologated fuel economy data for the 203 and 240 PS 2.0-litre Ford EcoBoost engines paired with Ford PowerShift, clearly demonstrates how efficient a modern powertrain combination with automatic transmission can be. The new Mondeo with this state-of-the-art powertrain delivers a combined fuel economy of just 7.7 l/100 km (36.6 mpg)* and an average CO2 emission level of just 179 g/km. The combination of Duratorq TDCi engine (140 or 163 PS) and Ford Powershift, generates an even more impressive combined fuel economy of just 5.6 l/100 km (50.4 mpg)*, with an average CO2 emission level of just 149 g/km.

For the driver, using Ford PowerShift is as simple and easy as a conventional automatic transmission, with a standard automatic gear lever in the centre console and the usual P, R, N and D settings available. In addition to this regular set-up, sport and manual modes can be selected by moving the gear lever to the right and into another adjacent position. In sport mode the transmission adjusts the shifting points to a higher revs for more performance, and down-shifts are executed more instantaneously if harder acceleration is required.