MDS on 6 speed 3.55 gears

[roadshow]

Over the past year I've come to the belief that MDS is pretty much useless on the 6 speed 5.7L for practically all driving conditions with the exception of completely flat continuous highways at 60 mph speeds and higher. I'm inclined to agree with this explanation from an older post when it comes to driving around town:

Turning OFF OVERDRIVE while driving in city traffic stops the car/truck from shifting into OVERDRIVE at low speeds "LUGGING".
Shifting to overdrive at slow speeds is COSTING you MPG because you are "LUGGING" the motor,rather than it be in the proper gear!! When "LUGGING" along and you need to speed up your car/truck downshifts and uses more fuel.
This constant "Lugging" is hard on your motor and transmission and burns more fuel.

I'd also like to add hilly single lane highways to that, because driving in regular D on those in the 6 speed causes a lot of downshifting uphill especially with MDS and on top of that it causes a performance hit as well as lag from MDS turning off when power is called for. I know you 8 speed guys don't have this issue, and I've driven the 8 and agree. Now I almost religiously drive in tow/haul in town speeds and I drive my hilly highway commute in ERS 6. The only time I allow MDS is on 3-4 lane highways.

It requires me to take more user control of my truck than the 8 speeds have to. But at least there's a silver lining to this. Every winter I have the peace of mind of a true 4WD lock instead of having 2 selections on a 4WD knob that both end up being the same kind of AWD. I really do not like handing over control to an AWD system in ****** winter conditions, especially on my country highway drives.

 

[Kytow]

Had mine turned off through tuning. When I take a road trip I have an eco tune and it gets turned back on.


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[Treburkulosis]

I run around with tow haul more on and I get better mpg then with mds or m6.

 

[Hemi395]

Had mine turned off through tuning. When I take a road trip I have an eco tune and it gets turned back on.


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What tuner are you running? Didn't realize it was that easy to swap tunes. Might have to pull the trigger on a tuner soon...

 

[Kytow]

What tuner are you running? Didn't realize it was that easy to swap tunes. Might have to pull the trigger on a tuner soon...

I have the older intune1000 (Diablo) basically the I2, but that allows more than one vehicle on one tuner.

Custom tunes by Jay Greene.




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[Rzrman328]

I use mine quite often in town still.

Mpg's (evic) have gone down approximately .2 gallons vs tow/haul off.

Just drives better especially with the 37's....at least by the butt dyno.

 

[huntergreen]

i find the mds yields a bit better mpg for me. when i want to turn mds off, i just use the gear selector so that 5 is shown, not the D. i see no reason to spend dollars on a tunee just to shut the mds off when you can do it with the shifter.