Automatic for the people
AMT takes the work out of transmissions
cheap as manual gearboxes but are generally more efficient and wear less than a manual controlled by a human.
They take longer to make a shift than a full automatic, which uses a torque converter like the majority of car automatics, but use less fuel.
Allison has watched as automated manuals have gained in popularity and has responded by developing the new automatic transmission with more gears.
Instead of having five gears, the box has twin counterhsafts. This means it is effectively a dual range gearbox like an Eaton Roadranger manual, although the driver will not need to flick the splitter switch to use the top half of the gear set.
Allison tells Carsguide that the new gearbox is only slightly heavier than a comparable single countershaft automatic transmission and only a little longer.
Allison says it currently only has a 3 per cent share of the heavy truck transmission market, but expects this to grow thanks to the new 10-speed automatic.
It showed the newamt transmission at the Mid America Truck Show in Louisville, Kentucky, earlier this month, fitted to a Peterbilt rig, and plans to introduce it in the US late this year.
The gearbox will then be made available in global markets, including Australia, although the arrival date for the Australian market is not locked in.
It’ll take off: Mercedes also will use Allison’s AMTIN some trucks