Geared for re­fine­ment

Land Rover’s nine-speed trans­mis­sion de­liv­ers a greater sense of con­trol

The Weekend Post - Motoring - - COVER STORY -

LAND Rover will demon­strate the lat­est in a long line of tech­ni­cal firsts at the 2013 Geneva Mo­tor Show with the an­nounce­ment of the world’s first nine-speed au­to­matic trans­mis­sion for a pas­sen­ger car.

The ZF 9HP trans­mis­sion is specif­i­cally de­signed for trans­verse ap­pli­ca­tions and is one of the most ef­fi­cient and tech­ni­cally ad­vanced trans­mis­sions ever used in a pro­duc­tion ve­hi­cle.

Land Rover is the lead part­ner on the project, work­ing to­gether with ZF who are widely recog­nised as be­ing the world leader in trans­mis­sion tech­nol­ogy.

In­creas­ing the num­ber of gear ra­tios from six to nine gives sig­nif­i­cant im­prove­ment in fuel econ­omy and a cor­re­spond­ing re­duc­tion in CO2 emis­sions.

Smaller ra­tio steps give im­proved re­sponse dur­ing ac­cel­er­a­tion, im­proved shift qual­ity, drive and re­fine­ment.

The higher top gear not only re­duces fuel con­sump­tion but the lower en­gine revs im­prove com­fort and re­duce noise when cruis­ing at high speed.

The 9HP is ex­tremely ro­bust and per­fectly com­ple­ments Land Rover’s rugged all-ter­rain abil­ity whilst de­liv­er­ing ex­cep­tion­ally high lev­els of re­fine­ment and ef­fi­ciency.

The low­est ra­tio in the 9HP is far lower than found in the ex­ist­ing sixspeed trans­mis­sion and is specif­i­cally de­signed for off-road use, tow­ing and more ex­treme on-road con­di­tions like gra­di­ents and al­ti­tude, giv­ing the driver a height­ened sense of con­trol.

With ex­tremely fast gear changes de­scribed by ZF as be­ing: ‘‘be­low the thresh­old of per­cep­tion’’, the 9HP is not only highly re­spon­sive but proves to be ver­sa­tile too.

Whereas the ex­ist­ing six-speed trans­mis­sion makes shifts se­quen­tially, the 9HP has a skip-shift func­tion for much swifter down­shift­ing un­der rapid de­cel­er­a­tion or from greater driver in­put de­mands.

The torque con­verter in­cor­po­rates a multi-stage damper sys­tem for smoother pulling away and im­proved re­fine­ment.

World first: Land Rover is set to un­veil its pas­sen­ger ve­hi­cle with the in­no­va­tive nine-speed au­to­matic trans­mis­sion.

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