2019 rough MDS

[Black_Pearl]

I have a 19 tradesman with the non etorque hemi and sometimes my switch back to 8 cylinders is very harsh to where the vibration turns into a slam that can be felt through the whole vehicle as if some bumped into the back of me. Most of the time it’s smoother, but I wouldn’t call it seamless. Averaging almost 22 mpg now, but am worries that harsh change is doing some damage to the drivetrain. Anyone else have harsh change when mds shuts off?

 

[Richard320]

Nope. I can only tell when MDS is going in and out by the ECO light and the instant fuel economy.

 

[popcenator]

My MDS transition was always very noticeable. I have it turned off in my tune but I never saw much of a difference anyway.

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[HeavyMetalHauler]

Pretty normal in my experience. Half the time MDS kicks in and out smoothly and other times it’s exactly how you describe.

 

[User_3336]

OMG! not another MDS thread!

 

[Black_Pearl]

Thanks everyone. With that said, it seems to be consensus that it’s okay to ride around with the gear limiter pegged to 8 all the time, right?

 

[Rototerrier]

Thanks everyone. With that said, it seems to be consensus that it’s okay to ride around with the gear limiter pegged to 8 all the time, right?

That's what I do, otherwise I get the kick in the pants and the vroomf noise as it switched from 4 back to 8. Horrible system.

 

[Lit_AF]

My MDS transition was always very noticeable. I have it turned off in my tune but I never saw much of a difference anyway.

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Heard by doing so the lifters collapse after some rough driving.
How true is that ?

 

[popcenator]

Heard by doing so the lifters collapse after some rough driving.
How true is that ?

I did the same on my 2012 and never had a problem for the 80K miles I ran the tune. The earlier 4th gens had more of a problem with the lifters too. Neither this truck nor the 2012 were babied if that helps.

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[Rototerrier]

Heard by doing so the lifters collapse after some rough driving.
How true is that ?

Way I figured it, Tow/Haul Mode does the same thing and I am towing about as often as I'm not. Therefor, I'm using the truck mostly as it is designed. If it's going to blow due to operating in this manner, then a truck used primarily for towing will do the same thing. I certainly wouldn't put it past RAM for having a design flaw, but I'll probably be out of this thing long before it blows.

 

[2020GraniteBH]

My MDS transition was always very noticeable. I have it turned off in my tune but I never saw much of a difference anyway.

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What kinda tune do you have and supporting mods to go along with it?