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  #25  
Old 08-06-2011, 07:24 PM
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Re: Why little to no confirmed info on 2012 6sp auto?

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Originally Posted by jgc4ever View Post

2012 5.7 L V8 Hemi - 6 speed transmission

1 --> 2 --> 3 --> 4 --> 5 --> 6
6 --> 5 --> 4 --> 3 --> 2 --> 1

Sorry if this is a repeat of what's already been said.

Or in other words:

2011 programmed to shift through five ratios like this:
up 3.00 - 1.76 - 1.00 - 0.75 - 0.67
down 0.67 - 0.75 - 1.00 - 1.50 - 3.00

2012 programmed to shift through six ratios like this:
up 3.00 - 1.76 - 1.50 - 1.00 - 0.75 - 0.67
down 0.67 - 0.75 - 1.00 - 1.50 - 1.76 - 3.00
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  #26  
Old 08-06-2011, 08:04 PM
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Re: Why little to no confirmed info on 2012 6sp auto?

What a crock... Well maybe getting the extra 1000 off a 2011 is the way to go then since this looks like it will do next to nothing for performance and fuel economy.
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  #27  
Old 08-06-2011, 09:25 PM
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Re: Why little to no confirmed info on 2012 6sp auto?

What is the TSB to ask for for the upgraded software in the 2011 Hemi?
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  #28  
Old 08-06-2011, 09:32 PM
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Re: Why little to no confirmed info on 2012 6sp auto?

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Originally Posted by edogg23 View Post
What a crock... Well maybe getting the extra 1000 off a 2011 is the way to go then since this looks like it will do next to nothing for performance and fuel economy.
What it means is that if you purchased a 2011 V8 with the 5spd, your fuel economy is the newly rated 13/20 after the TSB vs. 13/19 which is on the sticker. The 13/20 is the new rating for the 2012 Hemi with the "6spd".
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  #29  
Old 08-07-2011, 01:20 AM
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Re: Why little to no confirmed info on 2012 6sp auto?

That is a bit disapointing that they have decided to market the Hemi as a 6sp, when it is no different to the 6sp in the 2011 models, just displays the 2nd prime as 3rd.
This will hurt resale as people will perceve that the 2012 model has a better gearbox, when it does not.
I wonder if the 5sp in the CRD/V6 can do the same.
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  #30  
Old 08-07-2011, 05:29 AM
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Re: Why little to no confirmed info on 2012 6sp auto?

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Originally Posted by ENFORCER View Post
That is a bit disapointing that they have decided to market the Hemi as a 6sp, when it is no different to the 6sp in the 2011 models, just displays the 2nd prime as 3rd.
This will hurt resale as people will perceve that the 2012 model has a better gearbox, when it does not.
I wonder if the 5sp in the CRD/V6 can do the same.
Dont think they could do that with the merc trans.
Have not seen a 6 speed in the sprinters or the 300sl.
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  #31  
Old 08-07-2011, 08:54 AM
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Re: Why little to no confirmed info on 2012 6sp auto?

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Originally Posted by ENFORCER View Post
That is a bit disapointing that they have decided to market the Hemi as a 6sp, when it is no different to the 6sp in the 2011 models, just displays the 2nd prime as 3rd.
This will hurt resale as people will perceve that the 2012 model has a better gearbox, when it does not.
I wonder if the 5sp in the CRD/V6 can do the same.
The trans in the V6 is a true 5 speed with no 2nd prime or the underdrive.

The 2011 was not advertised as a 5 speed, it was advertised as a multi-speed.

In reality, with the underdrive the new trans is a 11 speed box where the older program made it a 10 speed because you only got 2nd prime on the downshift.
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Old 08-07-2011, 09:14 AM
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Re: Why little to no confirmed info on 2012 6sp auto?

Great find! Thanks for posting the info that confirms it's the same box. I did hear the 2012 also gets a new torque converter which may contribute to the increased fuel economy rating.
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  #33  
Old 08-07-2011, 10:17 AM
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Re: Why little to no confirmed info on 2012 6sp auto?

So, with my current 2011 5.7L that had the TSB update, when changing gears manually, I go through 1-2-3-4-5-D as before the update.
With the 2012, I would think the driver will see on the EVIC, 1-2-3-4-5-6-D.
Is that a correct assumption? And if it is, how can they be the same transmission.

Either Chrysler is fooling us or we are fooling ourselves.
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  #34  
Old 08-07-2011, 11:14 AM
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Re: Why little to no confirmed info on 2012 6sp auto?

Jeep marketing has been confusing customers, I think.... but its marketing.

At the risk of oversimplification,

The transmission has three planetary gear sets (each gives you two ratios), giving the transmission programmers 8 possible gear rations to select from by engaging a combination of gear sets (applying a clutch such that the ring gear is locked). So the transmission is actually an 8 speed. In a series planetary gear box, the gear ratios just multiply up.

However, due to size constraints, the engineers could not make all 8 speed useful (the combination making a unique ratio). So, in the end, there are only 6 useful gear ratios available. In order to get 8 useful gear ratios out of a 3 gear set transmission, engineers needed a planetary gear set too large of a diameter to fit in a case that also fits the numerous applications (without redesigning all the cars).

In 2012 the transmission is programmed to use all six useful ratios when upshifting and down shifting. (although marketing may want them to use all 8 so they have an 8 speed to sell )

Other manufactures either have more room (trucks) or solved the planetary gearset size problem by adding a fourth gear set (or more). A four gearset transmission gives you 16 possible gear ratios, but I'm not sure how many would be useful (unique). Its a math thing.
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  #35  
Old 08-07-2011, 12:06 PM
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So is the consensus that 2011 transmission = 2012 transmission with the exception of the gear display? If that's the case I may just buy a 2011 since my 2012 is stuck in D1....
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  #36  
Old 08-07-2011, 12:54 PM
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Re: Why little to no confirmed info on 2012 6sp auto?

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Originally Posted by nlowell View Post
So is the consensus that 2011 transmission = 2012 transmission with the exception of the gear display? If that's the case I may just buy a 2011 since my 2012 is stuck in D1....
Yes. The 2012 is just a reprogrammed transmission (2011s with the late TSB gives you the same 2012 transmission) with the gear ratios the same on the 2011s with the TSB and the 2012s. It makes sense when you think that why would Chrysler put in an entirely new transmission when the 2014 HEMIs are probably going to get the 8spd new tranny then since the 2013 V6s will all have it. That's what has changed my mind in addition to the cost savings on trying to find a 2011 that I want now instead of ordering a 2012.
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