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MDS Multi Displacement System Discussion


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  #1  
Old 03-14-2010, 03:49 PM
happyg happyg is offline
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Default I have a question....

Ok so I hear all this talk about the MDS well I bought my Ram used 07 Hemi 1500 and have no idea if it has the mDS. Is this standard on all trucks? If not where would I look to find out this information. Thanks All.
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  #2  
Old 03-14-2010, 03:51 PM
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MDS is not in the 4.7s, but it is in the 5.7s
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Old 03-14-2010, 03:54 PM
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Here is a thread that might help:

http://www.ramforumz.com/showthread.php?t=47443
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  #4  
Old 03-14-2010, 04:08 PM
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Looks like the MDS was available starting in the 06 model year .
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  #5  
Old 03-14-2010, 05:49 PM
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Unless it's a MegaCab, I believe you have MDS.
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  #6  
Old 04-27-2010, 11:38 AM
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So my truck goes in and out of MDS alot when i am cruaising down the highway between 55-65. if im going slower it seems to stay in or out or faster it stays in or out. But in that range it seems as if its constantly going in and out of MDS. Is this normal? If not what could cause this? it has a newer air filter, oil changes always done on time. The one thing i need to do is Spark Plugs but i dont understand how this could be the problem. What is a good plug to go with without breaking the bank? Thanks for the info in advance.
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  #7  
Old 04-27-2010, 12:13 PM
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Have you had the PCM flashed per TSB 18-006-10 REV. A?

SYMPTOM/CONDITION:

The customers may experience that the vehicle has a harsh engagement or has a
buck/jerking feeling at low speeds of around 12 mph (19 kmh) to 15 mph (24 kmh). The customer may also experience a harsh engagement or buck/jerking feeling during highway cruise control operation from 65 mph (105 kmh) to 75 mph (121 kmh).

These conditions are caused by excessive MDS transitions.

The MDS low speed engagement point has been changed to 21 mph (34 kmh). In addition to the MDS low speed engagement change, enhancements from V8 to V4 and V4 to V8 in all ambient temperatures and operating ranges have been made to make all the transition less noticeable to the customer.
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  #8  
Old 04-27-2010, 07:47 PM
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I have not heard of this i will be checking this out very soon. Will the dealer do this for me for free?
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  #9  
Old 04-27-2010, 08:05 PM
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If you're still under the 3/36 warranty, they should.
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Old 04-27-2010, 08:17 PM
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Quote:
Originally Posted by Remerson228 View Post
If you're still under the 3/36 warranty, they should.
I have 70K miles so i am not under the warrenty. When was this TSB released i cant find it anywhere online, was it released for 08s only?
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