It became available for trucks in 2001 and later buses in 2004.Technically the I-Shift is an unsynchronised parallel-shaft gearbox, with an electronic control unit, responsible for operating the pneumatic system that handles the clutch and shifts.
It is controlled either by a gearstick mounted on the driver's seat or by buttons on the dashboard, just like a standard automatic gearbox.
The different versions of the I-Shift are named AT (Automatic Transmission) or ATO, where the O stands for overdrive.
In June 2014,[4] Volvo Trucks presented a new dual-clutch version of the I-Shift, known as SPO2812, with overdrive and a maximum torque of 2800 N·m.
The new gears, which are added to the automated transmission, provides exceptional startability for trucks carrying heavy loads and can start from standstill for up to 325 tonnes of GVW.