Print 70 comment(s) - last by macca007.. on Aug 7 at 2:46 AM

The Chrysler 300 will be a recipient of the new 9-speed automatic transmission.
A 16% improvement in fuel efficiency is expected from nine-speed transmission

Automakers are pulling out all the stops and looking to squeeze every single mile per gallon out of their automobiles by any means necessary. Automakers are looking at more fuel-efficient engines with smaller displacements, but they're also looking at reducing the weight of vehicles and increasing the number of forward gears used in car/truck transmissions. 
Adding forward gears to a transmission makes a lot of sense because the slower the engine spins, the less fuel it consumes. In years past automatic transmissions used in vehicles commonly had four or five forward gears. More recent vehicles are moving up to six-speed and in some cases even eight-speed automatic transmissions in luxury vehicles. Chrysler is eyeing even more gears inside with nine-speed gearboxes for more mainstream vehicles.
According to Mircea Gradu, vice president transmission powertrain driveline engineering, Chrysler will roll out its first nine-speed transmission by the first half of 2013. “I’m convinced that, sooner or later, others will come up with similar solutions,” Gradu said in an interview from his office in Auburn Hills, Michigan, where Chrysler is based. “Hopefully, the time will be as long as possible until they catch up with the technology.”
Chrysler CEO Sergio Marchionne believes that the automaker and its various brands will be able to meet looming fuel-efficiency standards by using technology that improves traditional gasoline engines combined with better transmissions rather than moving to plug-in hybrids and pure electric vehicles. CAFE standards will reach 54.5 mpg by 2025.
Michael Omotoso, a powertrain analyst at LMC Automotive, said, "They’re [Chrysler] doing basically the bare minimum to satisfy government regulations. Their strategy is to meet the standards with minimum investment.”
Bloomberg reports that the nine-speed transmission Chrysler is developing could boost fuel economy of certain models by as much as 16%. Chrysler has already scored a 15% boost in the highway fuel economy of the Chrysler 300 and Dodge Charger by adding an eight-speed automatic transmission.

Source: Business Week

Comments     Threshold

This article is over a month old, voting and posting comments is disabled

So if this works so well then....
By 225commander on 8/1/2012 9:51:06 AM , Rating: 2
Why has it *not* been introduced yet(in mainstream) vehicles for consumers? I realize high # gear tranny's have been around in different racing circuits awhile. It seems to me that this 'innovation' i.e. adding more gears, would run counterproductive to the goal of weight reduction. I would also assume that potential maintenance, amount of fluid required, and rate of failure + cost to build would also offset some of the 'gain' in MPG. Also, if a high number of gears are used in a transmission then it stands to reason that you could run your engine at a much more narrow RPM range(and lower too) which leads me to believe that diesel would potentially benefit the most from such a change in drive train.

I always thought that a transmission (manual or auto) that had maybe 4-5 gears would work great if the spacing(ratios) between gears were setup differently. For instance, 1st would remain the same , then '2nd' would be more like 2.6, then '3rd' would be where 4th previously was, and finally '4th' would be like 6th or what used to be called 'overdrive'. Alternatively for vehicles with rear wheel drive would not a 2 gear rear end setup not work well with a 3 spd gear box up front, which would effectively be a '6 speed'?

RE: So if this works so well then....
By retrospooty on 8/1/2012 11:14:21 AM , Rating: 2
I dunno... I think of Chrysler and adding complexity like a 9 gear tranny, and think of failures. I think of being stuck on the side of the road waiting for a tow.

RE: So if this works so well then....
By DiscoWade on 8/1/2012 3:05:53 PM , Rating: 3
My first thought was why is Chrysler making 9 gears when they can't even do 1 right.

By YashBudini on 8/1/2012 7:41:16 PM , Rating: 2
Currently 9 will get you bragging rights. It's just a way to outdo your competition, though not in any meaningful way.

“So far we have not seen a single Android device that does not infringe on our patents." -- Microsoft General Counsel Brad Smith

Copyright 2016 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki