Emergency vehicles, such as fire tenders, have road-going performance and handling stability as priorities. Fuel consumption is not a key consideration. Automatic transmission in a vehicle with a high power-to-weight ratio gives rapid, safe acceleration.

At the other extreme, vehicles engaged in kerbside collection of garbage are likely to suffer excessive clutch wear with a manual gearbox. Automatic transmission completely overcomes the problem, leading to a lower cost of operation and easier driving.

Automatic transmission systems specified by Scania are based on well proven Allison units. Scania will supply the transmission required, according to the engine’s output. Any Scania engine up to 420 hp can have one of these transmissions, though most applications will be satisfied with performance from Scania 9-litre engines (230-310 hp).

The Allison transmissions have a long service life and smooth power delivery. Snatches and shocks within the powertrain are minimized – important for vehicles that are either constantly stopping and starting, or likely to be driven with extreme vigour. Software for the gearbox is programmed to suit anticipated road performance.

Power take-offs and retarders are available as options.

Other applications
Since the introduction of Scania Opticruise, demand for automatic transmission associated with applications such as urban distribution has diminished. Opticruise offers many of the driving benefits associated with automatic transmission without a fuel penalty, whereas automatic transmission will always have a tendency to use more fuel.