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  #1  
Old 03-22-2012, 06:26 AM
2012Longhorn 2012Longhorn is offline
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Default MDS Disable on our 2012s

From what I understand, on the 5 speed trannys, you could just bump the shift once to the left to put it in "5" and that disables the MDS.

On our 2012s, if you bump it once to the left, it goes to "1"...would I then bump it to the right 5 times until it displays "6" to disable MDS?
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Old 03-22-2012, 07:51 AM
dkerr24 dkerr24 is offline
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correct.... the shifter will go to the current gear you are in.... so if you were at cruising speed and hit the shifter, you would go into '6'.

Darin
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Old 03-22-2012, 10:17 AM
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Quote:
Originally Posted by dkerr24 View Post
correct.... the shifter will go to the current gear you are in.... so if you were at cruising speed and hit the shifter, you would go into '6'.

Darin
Makes sense, thanks.
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Old 03-22-2012, 10:50 AM
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some have posted better mpg in town, not hwy, by locking out six on the shifter.
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Old 03-22-2012, 12:48 PM
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I like to stay in 4 or 5 sometimes when in the city. I get better throttle response. I'm sure it has a slight hit on MPG.
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Old 03-22-2012, 01:22 PM
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Doing this does not disable MDS. All it does is pick the top gear you want to drive in just like downshifting. Has nothing to do with MDS.
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Old 03-22-2012, 02:11 PM
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In order to off the MDS all you have to do is put the truck into Tow/Haul and it will give full power until you turn it off.
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Old 03-22-2012, 06:38 PM
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Placing it in tow/haul also does not turn off the MDS. All it does is downshift the tranny into 3rd gear.

Last edited by jeepgrady; 03-23-2012 at 04:48 AM.
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Old 03-22-2012, 06:57 PM
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on my '09 with the 545RFE 5 speed
the MDS is enabled only in the highest gear, 5th over drive
If my EVIC reads Fuel Saver, the MDS is engaged
On the 2010 & newer Rams, it will read ECO instead of Fuel Saver

look at the light beside the odometer

http://imageshack.us/f/829/img0620nv.jpg/
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Old 03-23-2012, 08:59 AM
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On the 2012 RAM's if you put it into Tow/Haul the engine will not go into "eco" mode which is the name they have for it when it shuts off 4 cylinders. Also MDS is not a mode it is a type of ENGINE, MDS (Multiple Displacement) engine, "eco" is the mode you are trying to avoid where is shuts off the cylinders, Correct? So put it into Tow/Haul and give it a try I bet you never go into "eco" mode. On the 2012 I am not sure what you are driving. Either way I hope this helps and you get everything figured out.
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