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MDS Multi Displacement System Discussion


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  #1  
Old 03-06-2011, 08:08 PM
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Default MDS Question

So i have had a few guys that are telling me my truck does not have MDS. My truck is a 2004 qc 1500. I only ask cause i changed my plugs on the truck all 16 of them which i am assuming 8 are main with the coil packs and 8 are the waste spark which is for the MDS. I also know when i get on the freeway and get to freeway speeds the truck shifts into over drive then the RPM's drop again which i am also assuming is the MDS kicking in. If someone can shed some light for me as to if these guys are just arguing with me cause they can or if my truck has something it shouldnt.

Dustin
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Old 03-06-2011, 08:13 PM
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you definetly do not have mds you have same as myself 2006 and newer ram 1500 have mds.mds first came in the 300 and charger late03-04 ram not an option then.all hemi have 16 plugs
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Old 03-06-2011, 08:20 PM
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So the fact that my truck cruises around 70 at low RPM must just be the fact that its a 5speed auto and i am used to 4speed autos. Why did they run 16 plugs if there is no MDS? that seem like a waste. what are the other 8 used for then?
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Old 03-06-2011, 08:21 PM
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The RPM drop you see is the torque converter locking up.
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Old 03-06-2011, 08:25 PM
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Quote:
Originally Posted by RamTech View Post
The RPM drop you see is the torque converter locking up.

That makes sense. Makes me wonder if i should complain about my mileage then? i get around 13.8 in the city and on our drive to vegas i got up to 21. Is that average below average or above?
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Old 03-06-2011, 08:38 PM
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That's right on the money.
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Old 03-06-2011, 09:31 PM
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good to know. Thanks
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