Chrysler Group's TorqueFlite eight-speed transmission could be earning some serious green bragging rights if the company's projections are correct. The recently widely proliferated automatic gearbox, which is now in more than a million vehicles around the world, is poised to save drivers an estimated 700+ million gallons of fuel over the vehicles' lifetimes (an expected cost savings of $2.5 billion). In addition, Chrysler expects a reduction in CO2 emissions by more than six million metric tons.

According to Chrysler, and depending on the vehicle, the TorqueFlite can improve fuel economy. The TorqueFlite autobox features particularly close ratios from fifth to eighth gear (see the press release below for the specific numbers), and uses low-viscosity fluid that doesn't need to be replaced. Transmission software adapts to the driving situation to optimize efficiency based on driver behavior, temperature, grade, stability control, and longitudinal and lateral acceleration.

The TorqueFlite is capable of handling a variety of duties.

As evidenced by the wide range of vehicles Chrysler Group has seen fit to equip with the eight-speed transmission, the TorqueFlite is capable of handling a variety of duties. Since its 2012 introduction, the TorqueFlite has gone from performing cog-swapping duties in Dodge Charger and Chrysler 300 models equipped with the 3.6-liter Pentastar V6 to changing gears in vehicles such as the Pentastar- and Hemi-powered Dodge Durango, Jeep Grand Cherokee and even the Ram 1500 EcoDiesel.

For the 2015 model year, the eight-speed is finding its way into even more vehicles with the addition of a third version. In addition to the American-made TorqueFlite 845RE and 8HP70, the new 8HP90 will be manufactured in Saarbrucken, Germany. The 8HP90 is designed for higher torque loads, making it ideal for high-performance vehicles like the 2015 Dodge Challenger SRT Hellcat. The already-in-use 8HP70 will expand its duties to be used in 2015 Hemi models such as the Dodge Charger, Challenger, and Challenger SRT8. You can see the list of those benchmarks in Chrysler's press release below.
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Chrysler Group Customers on Track to Save $2.5 Billion, 700+ Million Gallons of Gasoline With TorqueFlite Eight-Speed Automatic Transmissions
  • TorqueFlite eight-speed automatic transmissions now in more than one million vehicles worldwide
  • Vehicles projected to save more than 700 million gallons of gasoline; worth an estimated $2.5 billion, based on fuel-price forecasts
  • Total estimated reduction in C02 emissions – more than six million metric tonnes
  • TorqueFlite transmissions in model-year 2014 vehicles contribute to 19 fuel-economy/driving-range benchmarks across four vehicle segments
  • TorqueFlite availability expanding to HEMI®-equipped Dodge Charger, Challenger lineups for model-year 2015
June 16, 2014 , Auburn Hills, Mich. - Fuel savings and emissions reductions attributed to TorqueFlite eight-speed transmissions are adding up to substantial gains for Chrysler Group customers.

The advanced-technology automatics – first of their kind ever made available to mainstream-brand customers – now are powering more than one million vehicles, worldwide. And their combined effect is staggering.

Over their lifetimes, vehicles equipped with TorqueFlite eight-speed transmissions are projected to save their owners more than 700 million gallons of fuel, compared with their predecessors that featured five- or six-speed automatics. That quantity of gasoline is worth approximately $2.5 billion at the pump, based on current fuel-price forecasts.

This will also reduce combined CO2 emissions by more than six million metric tonnes.

TorqueFlite eight-speed transmissions in model-year 2014 vehicles also contribute to 19 Chrysler Group fuel-economy or driving-range benchmarks across four vehicle segments.

"This is precisely the kind of impact we targeted with the TorqueFlite program," says Jeffrey Lux, Vice President and Head of Transmission Powertrain. "And we fully expect this momentum to continue as we expand availability."

Starting in model-year 2015, the TorqueFlite 8HP70 transmission can be paired with HEMI®-equipped Dodge Chargers, Challengers and Challenger SRTs.

When the TorqueFlite 8HP45/845RE made its debut in model-year 2012 as the world's first eight-speed available outside the luxury market, the transmission was mated exclusively to Chrysler Group's award-winning 3.6-liter Pentastar V-6 in the Charger and Chrysler 300 lineups.

Since then, the TorqueFlite 845RE and 8HP70 have migrated, respectively, to Pentastar- and HEMI-powered versions of the Dodge Durango, Ram 1500 and Jeep Grand Cherokee lineups. The 8HP70 also serves EcoDiesel versions of the 1500 and Grand Cherokee.

With the introduction of the 2015 Dodge Challenger SRT Hellcat, the TorqueFlite transmission family adds its third member – the 8HP90 high-performance automatic that affords greater torque capacity than any eight-speed previously offered by Chrysler Group.

Depending on the application, a TorqueFlite transmission can account for fuel-economy improvements of up to nine percent, compared with a more conventional automatic.

"The TorqueFlite's wide 7.03 ratio spread is the reason it can deliver such superior performance," Lux says. "This enables engines to operate at peak efficiency in a broader range of driving conditions."

The TorqueFlite family shares these gear ratios:

4.71
3.14
2.10
1.67
1.29
1.00
0.84
0.67

Particularly close from fifth through eighth, the gear ratios also improve refinement by accommodating smoother shifts. In addition, the 4.71 first-gear ratio contributes to the kind of quick throttle response customers want and enjoy.

Fully electronic, the TorqueFlite family's software adapts the transmission's shift patterns to driver behavior and driving conditions such as:

longitudinal and lateral acceleration
grade steepness
temperature
electronic stability control activation

The TorqueFlite's design inherently contributes to efficiency. Paired with the 5.7-liter HEMI V-8 in the 2015 Dodge Challenger, it weighs just four lbs. (1.8 kg) more than the five-speed gearbox it replaces while contributing to a fuel-economy gain in the range of five percent.

Internally, the transmission features four gear sets and five shift elements consisting of multi-disc clutches and brakes. Only two shift elements are open at one time, which reduces drag losses stemming from the rotation of multiple parts.

Lower viscosity transmission fluid is used to improve operating efficiency and fuel economy, especially during cold environments or vehicle start-up. The TorqueFlite also is "fill-for-life," never requiring oil changes, when subjected to normal driving conditions.

In the Ram 1500, TorqueFlite function benefits further from a thermal management system that quickly raises engine and transmission fluid temperature. This improves fuel efficiency by 1.7 percent by reducing the parasitic losses that occur when engine oil and transmission fluid are in their natural, lower-viscosity states.

Model-year 2014 benchmarks to which TorqueFlite technology contributes are:

Best-in-class city fuel economy, 2WD full-sized pickups (20 mpg; Ram 1500)
Best-in-class highway fuel economy, 2WD full-sized pickups (28 mpg; Ram 1500)
Best-in-class combined fuel economy, 2WD full-sized pickups (23 mpg; Ram 1500)
Best-in-class city fuel economy, 4WD full-sized pickups (19 mpg; Ram 1500)
Best-in-class highway fuel economy, 4WD full-sized pickups (27 mpg; Ram 1500)
Best-in-class combined fuel economy, 4WD full-sized pickups (22 mpg; Ram 1500)
Best-in-class city fuel economy, 2WD mid-size SUVs, non-hybrid (22 mpg; Jeep Grand Cherokee)
Best-in-class highway fuel economy, 2WD mid-size SUVs (30 mpg; Jeep Grand Cherokee)
Best-in-class combined fuel economy, 2WD mid-size SUVs, non-hybrid (25 mpg; Jeep Grand Cherokee)
Best-in-class driving range, mid-size SUV (730+ miles; Jeep Grand Cherokee)
Best-in-class driving range, full-size SUV with V-6 (600+ miles; Dodge Durango, full-size SUV)
Best-in-class driving range, gasoline-powered mid-size SUV (600+ miles; Jeep Grand Cherokee)
Best-in-class highway fuel economy, full-size RWD sedan with V-6 (31 mpg highway; Dodge Charger and Chrysler 300)
Best-in-class highway fuel economy, full-size AWD sedan with V-6 (27 mpg city; Dodge Charger and Chrysler 300)
Unsurpassed* city fuel economy, full-size AWD sedan with V-6 (18 mpg city; Dodge Charger and Chrysler 300)
Unsurpassed* combined fuel economy, full-size RWD sedan with V-6 (23 mpg; Dodge Charger and Chrysler 300)
Unsurpassed* combined fuel economy, full-size AWD sedan with V-6 (21 mpg; Dodge Charger and Chrysler 300)
Unsurpassed* city fuel economy, full-size RWD sedan with V-6 (19 mpg; Dodge Charger and Chrysler 300)
Unsurpassed* city fuel economy, full-size AWD sedan with V-6 (18 mpg; Dodge Charger and Chrysler 300)

The TorqueFlite 845RE is produced under license from ZF Friedrichshafen AG at Chrysler Group's manufacturing complex in Kokomo, IN. The 8HP70 and 8HP90, respectively, are produced at ZF's plants in Gray Court, SC, and Saarbrucken, Germany.

Chrysler Group Powertrain
Development of advanced-technology powertrains has been a primary focus of Chrysler Group since the Company was established in 2009. To date, Chrysler Group's investment in powertrain programs is approaching $2.5 billion – nearly half of its total manufacturing outlay. From model-year 2011 to the present, Chrysler Group has introduced 18 new engines, 15 new transmissions and the battery-electric drive system featured in the acclaimed Fiat 500e all-electric vehicle.

* in segment


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    • 1 Second Ago
  • 40 Comments
      Nuke1
      • 4 Days Ago
      I love the 8spd in my Chrysler 300. Car weighs 4200lbs and gets 24mpg city and 30mpg Highway with a 300hp V6..
      • 4 Days Ago
      What is the guarantee on this transmission? Will Chrysler put its reputation on the line and honor a 150,000 mile warranty? Probably not, given their track record wih FWD cars and minivans. And please, Chrysler, stop trying to integrate so many functions. Wouldn't be surprised if the next big recall is downshift when wipers are turned on, or something equally infuriating, ludicrous, and expensive.
        cololx6
        • 4 Days Ago
        Chrysler will give you a bumper-to-bumper lifetime warranty today for a lower price than they have in the past, so you do the math.
      Spec
      • 4 Days Ago
      Even if it is their biggest, it was not a very big refinery and was only for domestic consumption. The Iraq situation is a mess but so far most of the real important oil infrastructure is not in danger since most of it is south of Baghdad.
      Levine Levine
      • 4 Days Ago
      Let's get the facts straight. This 8 speed auto trans is not entirely a Chrysler's design. If my memory serve me right, by agreement with Chrysler several years ago, GM, and Ford collaborated in the development of this 8 speed auto transmission. If I am correct, Chrysler should share the limelight with fellow co-developers.
        lne937s
        • 4 Days Ago
        @Levine Levine
        It is a ZF transmission-- it is not Chrysler's design at all. Chrysler just re-branded it and makes some under liscense. It was developed by the German company and is in many vehicles from multiple manufacturers. Particularly BMW, Audi, Jaguar/Land Rover... http://en.wikipedia.org/wiki/ZF_8HP_transmission
          Nuke1
          • 4 Days Ago
          @lne937s
          Finally someone with a clue!
      CoolWaters
      • 4 Days Ago
      Brent Crude closed at $114 a barrel, so, this is great, but is it enough.
        paulwesterberg
        • 4 Days Ago
        @CoolWaters
        Extremists Said to Take Control of Iraq’s Biggest Oil Refinery http://www.nytimes.com/2014/06/19/world/middleeast/iraqi-oil-refinery-ablaze-as-army-and-militants-clash.html
      2 wheeled menace
      • 4 Days Ago
      It will be good for reducing pumping losses as a CVT does..... but it's really just lipstick on a pig.
        2 wheeled menace
        • 4 Days Ago
        @2 wheeled menace
        I wouldn't trust it either, if Chrysler has any part in designing it. This company is literally famous for designing the crappiest transmissions money can buy.
          paulwesterberg
          • 4 Days Ago
          @2 wheeled menace
          Can confirm, had Chrysler transmission crap out on me before 100k miles.
      Tilo
      • 4 Days Ago
      If they want to save Gas,then they need to zero in on the Engine.Direct Injection would help. A smaller displacement would also be a additional step. Dodge and Chrysler Cars have allways been Gas Gusslers !
        Nuke1
        • 4 Days Ago
        @Tilo
        The new 3.6 (since 2011) does have Direct Injection
      lad
      • 4 Days Ago
      Gotta be heavy with all that extra gearing; gotta be more complicated with all those pressure passages; Gotta be more internal friction with all those bearings. Might be time to give up and convert to electric. Or, maybe it's time for Chrysler to admit they can't keep up and go out of business.
        Nuke1
        • 4 Days Ago
        @lad
        It is bilt by an outside group and has been used by Mercedes and BMW for about 4 years
      Davey Hiltz
      • 4 Days Ago
      Now that is smart of them. I drive a 5 speed and it eats up more gas than my 6. It's by a marginal amount, but it gets that much better over time. I really like this idea though, I wonder when it will be fully implemented, or what might be the drawbacks of it. http://www.brightonauto.com/Repairs__Service_and_Parts.html
      Richard
      • 4 Days Ago
      In my normal driving, I probably wouldn't even get up past 5th gear.
        Nuke1
        • 4 Days Ago
        @Richard
        it's in 8th by 55mph
        HollywoodF1
        • 4 Days Ago
        @Richard
        Do you think the increased number of gears means you use them at correspondingly higher speeds? If that were true, any car with a continuously variable transmission, which has an infinite number of gears, could go the speed of light.
      itsme38269
      • 4 Days Ago
      Or they could ditch the engine entirely and go with a 1-speed transmission on an EV and reduce oil usage by 100%.
        Ray
        • 4 Days Ago
        @itsme38269
        how is it saving gas by sitting in the show room?
      • 4 Days Ago
      All you transmission experts just amaze me. These new 8sp TorqueFlite transmissions were developed by ZF... the same company that delivers transmissions to Porche, VW(Audi), BMW, Mercedes, GM, Ford, Nissan... just naming a few. These are NOT Chrysler transmissions... they are ZF transmissions licensed to Chrysler.
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