Au­to­matic for the peo­ple

AMT takes the work out of trans­mis­sions

Herald Sun - Motoring - - Working Wheels -

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

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