6.4 MDS annoying?

[Alexpaul09]

I have a 14 2500 with the 6.4 and I find myself always putting it into 6th gear once I get to highway speed cause I get sick of that annoying vibration. Anyone else feel the same way?

 

[Punishher7]

I am definitely not a fan of MDS. I understand why some people want it but I firmly believe it should be able to be permanently disabled without voiding warranty.


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[MADDOG]

I had the MDS system on my 2014 6.4 turned off with a custom tune from Hemifever.

 

[Ratket]

Alex, it could be your motor mounts or body mounts. If I remember correctly some 6.4 owners had bad motor mounts that yielded excessive vibration.

 

[RLM5150]

I haven't noticed any vibration. I have a 2016 with 33,000 miles.

 

[GsRAM]

I'm right there with you bud, i can absolutely feel when the mds kicks in on my 4800 mile truck. There is some vibration and the exhaust tone changes.

I'm not a fan of it. A V8 is designed to run with all 8 holes lit all the time, at least in my opinion

 

[sandawilliams]

I haven't noticed any vibration. I have a 2016 with 33,000 miles.

Mine seldom activates in Colorado but at lower elevation it works often. Never has bothered me.

 

[wallacemf]

I have gotten into the habit of just dropping the truck to 6th gear with the +/- button, every time I start it. It seems to lock out the MDS.

 

[BrianJE]

I hate the MDS. I never run it!

 

[GsRAM]

I have gotten into the habit of just dropping the truck to 6th gear with the +/- button, every time I start it. It seems to lock out the MDS.

Correct, when you go into manual mode it locks out the mds and my truck responds and shifts better.

 

[zeddy]

My truck runs like crap with mds, tranny shifts funny, seems like it's confused. When I turned it off, runs like its suppose to. Always has power, especially when it's down shifting. I only use it on the highway when I'm cruising. City driving or stuck in traffic, turn that off.

 

[[email protected]]

How are you guys shutting it off besides going into manual mode. I'm going to put a HEMIFEVER custom tune on soon and I believe I can have the MDS shut off. Just curious until i tune it.

 

[GsRAM]

Only way i know of is to shift into manual mode with the selector button. I don't know if you engage tow/haul mode if that locks out the. Mds also or not?

Beyond that yes, I believe that MD posted he had his turned off permanently with a hemifever tune. That may be something I look into once I'm out of warranty

 

[mohemipar]

I found my MDS became much more noticeable after swapping the muffler. A little vibration can be felt. But it’s mainly just the exhaust tone change and you can easily feel a loss in engine power. But even now I don’t find it unbearable. I do always turn it off in and around town though. Because the truck just runs 50 times better without it and it’s frickin pointless during stop and go driving in an 8000 pound, 7” tall truck. I leave it on when on the highway or longer trips and the truck gets decent MPG. On the highway with cruise on at 70 I cant really feel it anymore and only hear the change of exhaust tone. Which I could care less about on the highway.

Some say they can easily feel a lot of vibration even with a stock truck, others cant feel any. I fell into the latter category and I am usually pretty in tune and sensitive to my vehicles. It makes me wonder if some trucks just run different from others. Maybe some trucks the MDS is much more pronounced for some reason.

I will say that stock vs. stock the MDS feels almost exactly the same in the 392 Charger as it does in the Ram. At least for my particular vehicles.

 

[68PowerWagon]

Only way i know of is to shift into manual mode with the selector button. I don't know if you engage tow/haul mode if that locks out the. Mds also or not?

Beyond that yes, I believe that MD posted he had his turned off permanently with a hemifever tune. That may be something I look into once I'm out of warranty

Yeah tow/haul mode will disable it as well.

 

[GsRAM]

Yeah tow/haul mode will disable it as well.

Thanks PW.

 

[MasonD21]

There is a TSB out there that will improve the transitions and shift pattern of the transmission. Initially I had them do it on my truck to stop a clunk or jolt effect from the transmission, but it altered a few other things as well. I dont know if it would make a difference on the 2014, but any truck built with a 66RFE transmission and MDS seems to benefit.

 

[Rampant]

I have a 14 2500 with the 6.4 and I find myself always putting it into 6th gear once I get to highway speed cause I get sick of that annoying vibration. Anyone else feel the same way?

Here is the TSB for this issue:

DATE: January 16, 2016

SUBJECT:
Engine Mounts Replacement


OVERVIEW:
This bulletin involves replacing the right and left engine mounts.


MODELS:

2014 - 2016 (DJ) Ram 2500 Pickup


NOTE :This bulletin applies to vehicles within the following markets/countries: NAFTA.


NOTE :This bulletin applies to vehicles built on or before October 11, 2015 (MDH 1011XX) equipped with 6.4L Engine (sales code ESA).


SYMPTOM/CONDITION:
The customer may describe a drone/noise or excessive vibration condition when the engine is operating in ECO mode.


DIAGNOSIS:
If the customer describes the symptom/condition listed above, perform the Repair Procedure.
PARTS REQUIRED:

REPAIR PROCEDURE:

Replace the left and right side engine mount insulators. Refer to the detailed service procedures available in DealerCONNECT> TechCONNECT under: Service Info> 09 - Engine, 6.4L/Engine Mounting/Insulator, Engine Mount, Engine Mount, Left/Right> Removal/Installation.

POLICY:
Reimbursable within the provisions of the warranty.

 

[Deki]

I don't understand the hate for mds. I like it. Changes the sound a bit, but doesn't change the feel and there is no increase in vibration, plus I get 18ish on the highway with it. 2018 2500 4x4

 

[Megazor]

Adding my 2 cents.

About 2 years ago at 14000ish miles, I had a bad body mount on the front driver's side. MDS vibration was more pronounced with the bad mount, and there was a clunking in the floor feeling while driving over bumps that dropped off. After the body mount was replaced the MDS was only noticeable by engine tone. In the last couple of weeks, the clunk in the floor and vibration while MDS is active has returned. Be interesting if it is the mount again since the new one is just hitting the mileage of when the first one failed.