Advertisement

Fancy A 9-Speed Gearbox For Better Gas Mileage? Chrysler Does

Follow Antony

2013 Dodge Dart test drive, Austin, Texas, April 2012

2013 Dodge Dart test drive, Austin, Texas, April 2012

Enlarge Photo

To those who remember "three on the tree" or "four on the floor", today's seven and eight-speed automatic transmissions seem to offer a bewildering amount of gears to choose from.

Chrysler will go one better in 2013 with a nine-speed automatic transmission, as the maker looks towards improving transmission technology as a way of creeping towards the 54.5mpg 2025 Corporate Average Fuel Economy targets.

Several carmakers now offer seven-speed trasmissions--sports car maker Porsche even offers a seven-speed manual--while a select few also supply you with eight gears.

If you've not driven a car with that many gears it can sound excessive, but it's actually very effective at meeting the twin targets of performance and efficiency that many buyers seek.

Where an old five or six-speed automatic might occasionally find itself "between gears"--i.e. a situation where one gear doesn't offer enough power, but the one below is revving too high, wasting fuel and offering limited acceleration before another change up--seven and eight-speeders are more likely to be in the right gear, more of the time.

That means they can quickly and smoothly change up to very high gears at a cruise (improving economy), but there's still a broad repetoire of gears to choose from should you flex your ankle for a bit more power.

Chrysler already offers an eight-speed auto, in the Dodge Charger and Chrysler 300. Highway economy improved by 15 percent in each when those models gained the new transmission, with very respectable 31 mpg highway from the 3.6-liter V6.

Gearbox builder ZF, who'll make the new 9-speed, predicts a 16 percent improvement in vehicles like the Dodge Grand Caravan. According to Automotive News, all Chrysler's front-wheel drive models will be considered for the 9-speed transmission, while rear-drive vehicles will get the 8-speed, licensed from ZF.

Surprisingly, the 9-speed unit shouldn't be appreciably bigger than existing transmissions, as Chrysler is considering it for the Dodge Dart compact, as well as Dodge and Chrysler minivans, and some future Alfa Romeo models.

+++++++++++

Follow GreenCarReports on Facebook and Twitter.

Advertisement
 
Follow Us

 

Have an opinion?

  • Posting indicates you have read this site's Privacy Policy and Terms of Use
  • Notify me when there are more comments
Comments (7)
  1. Odd number of gears don't make sense. They are marketing ploys. The gears should be in the set of 2s. 4, 6, 8 10 all makes sense. The odd ones are wasting a set of clutch and planet gear set. If you have a 9 speed, you might as well go to 10.
     
    Post Reply
    Vote
    Bad stuff?

  2. Also, why NOT just go to CVT instead of 9 speed...
     
    Post Reply
    +1
    Bad stuff?

     
  3. Good question. This time next decade, the CVT will be the norm n the multigear trans the unique? CVT now in the new Altima has a great combo of performance n efficiency.
     
    Post Reply
    Vote
    Bad stuff?

  4. My sentiments exactly!
     
    Post Reply
    Vote
    Bad stuff?

  5. What about reliability; putting more gears in a smaller form factors means lightening the whole package. My family had a Chrysler with a 3 speed Auto years ago that was rock solid; my wife has a Dodge Grand Caravan w/4 sped auto which has have three overhauls in less than 150k (I drive a stick myself !)
     
    Post Reply
    Vote
    Bad stuff?

  6. I am think that Chrysler (Fiat) is doing that b/c they have no "copy right" on any of the CVT designs. So, either they have to license a current design or start from scratch and risk reliability and quality. Adding a gear to an existing transmission if fairly low risk and easy to implement. But, I would still think a CVT would be lighter and cheaper to build for such small car.
     
    Post Reply
    Vote
    Bad stuff?

  7. If Chrysler keeps adding gears to infinity they'll wind up with a CVT.
     
    Post Reply
    Vote
    Bad stuff?

 

Have an opinion? Join the conversation!

Advertisement

Find Green Cars

Go!
Advertisement

Advertisement

 
© 2014 Green Car Reports. All Rights Reserved. Green Car Reports is published by High Gear Media. Send us feedback. Stock photography by izmo, Inc.