ZF creates world's first nine-speed automatic transmission


TopGear.com.ph Philippine Car News - ZF creates world's first nine-speed automatic transmission

There was a time when automatic transmissions only had as much as three speeds. Today, however, cars utilize slushboxes that have as few as four to as many as eight speeds depending on the brand. Now, driveline manufacturer ZF has one-upped everyone by unveiling the world's first nine-speed automatic transmission.

Designed for transverse-mounted engines, the nine-speed transmission--which is known internally as the 9HP--is capable of handling 280 to 480Nm of torque. The transmission was also designed as a construction kit so that it can be applied cost-efficiently not only to front-wheel drive cars but also for all-wheel drive and hybrid platforms as well as those with start-stop systems.

The 9HP is also 16 percent more fuel-efficient than current six-speed automatic gearboxes used by front-wheel driven car thanks to its "extremely high total spread of 9.84."

"Extremely small gear steps can be realized thanks to the nine speeds," ZF said in its statement. "This does not only have a positive effect on driving comfort but, in addition, the engine always runs in the consumption-optimal speed range: In the ninth speed, there are only 1,900 revolutions per minute at 120 km/h instead of 2,600 in case of transmissions featuring 6 speeds."

ZF achieved the high number of speeds with the 9HP by utilizing four individual gear sets and six shifting elements. As it was a challenge to place the components in the limited transmission installation space offered by front-wheel drive cars, the gear sets were "intelligently nestled in" instead of being mounted on the 9HP's longitudinal axis.

Though the 9HP has yet to be used as an Original Equipment Manufacturer (OEM) component, ZF has revealed that "its smooth starting and maneuvering quality" is valuable to "the USA and the Asian markets."

Any guess as to which carmaker will be the first to use ZF's nine-speed automatic gearbox?


User account login

Not registered? Click here to be a TopGear.com.ph member.

Forgot your Password?.

Click this link to view our posting guidelines.

Filter comments by:
  • docmart70 Jun 10 2011 @ 07:04am
    Chrysler already has talks with ZF to acquire the transmission for its FWD vehicles since last year and will install them for the 2012 model year
  • hajabah Jun 10 2011 @ 12:19pm
    I always remember Jeremy Clarkson on the IS-F's 8-speed tranny that 8 gears is just too much. The ecu just doesn't know where to go; it's always hunting. now with 9 speeds?
  • Adrian Jun 10 2011 @ 01:25pm
    If valuable ang USA at Asia sa 9 speed automatic transmission gearbox, I think makagawa ang Lexus nyan ngunit medyo matagal pa yan, ganun din sa Toyota. Siguro makakagawa din ang BMW ng 9 speed automatic transmission gearbox! wow
  • ieatworld Jun 10 2011 @ 05:43pm
    lol ung mga truck nga na sobrang laki 16 speed.
    • JuanC Jun 11 2011 @ 12:48am
      Kasi di kakayaning ng makina yung load plus malaki ung engine ng truck
  • iam3739 Jun 10 2011 @ 10:37pm
    I think they should sell it as kits too... Good for those who want to built there own kit cars, 9 speed is cool!nnIf you have the money to burn of course.
  • pat Jun 11 2011 @ 03:36pm
    That's just...too much. I remember a Top Gear review of the Lexus IS-F with 8 gears, and then, that was too much.
  • specx_27 Jun 12 2011 @ 11:11am
    ms ok sna qng 9speed manual transmission
  • SuperSnake Jun 15 2011 @ 09:39pm
    Seriously!? I don't even use the 6th gear. Now cars have 9? What is happening?
Filter comments by:
1 to 8 of 8