Odd shifting?

[Jakal]

I have a new 2020 limited 4x4 off-road edition with 5.7l hemi 1500 miles on it

when driving at a constant 35mph (around 1200rpm) it will seem to hunt for a different gear intermittently and I can feel it shift. The rpms do not seem to change

just seems odd

the 2017 big horn 4x4 with the v6 I traded in never did this as it was smooth as silk shifting at all times


I had 27000 miles on it

thanks

jack

yuma. AZ

 

[RandomRam]

Sounds more like MDS engaging and disengaging. Try setting the gear limit to 8 using the buttons on the steering wheel. If that smooths it out there you go.

 

[Jakal]

First trip today around 50 miles of in town and interstate
Totally all miles using 8 setting

not one instance of issue

going to try a couple more trips to make sure this is it

if so is there a fix to this or do you just have to run in setting 8
If no fix available is it hurting to leave it in normal (mds) mode

 

[RVGuy]

I think it's normal operation. If I remember correctly the MDS will activate and deactivate intermittently to prevent the 4 cylinders that deactivate from cooling down and creating issues.
In terms of being able to feel it, it seems like some trucks/people are more sensitive to the MDS but I can't see it hurting anything by letting it do it's thing. I personally turn mine off but that's more because I don't like the feeling/sound of it kicking on and off constantly.

 

[Jakal]

Does the mds function at all speeds

I thought it was just 60mph and above

 

[buddy guy]

All speeds. I can hear it motorboating as I drive through my 20 mph neighborhood.

Sent from my SM-N960W using Tapatalk

 

[RVGuy]

Yup, all speeds. If I leave it on I can hear it running at 30km/h and it'll even stay on while accelerating around corners if I'm light on the throttle.

 

[RandomRam]

Glad the gear limi trick worked. I have a 2500 but my 6.4 does the exact same thing. I leave MDS on while driving on the freeway but disable it in town or in the forest. The low speed activation is a bit of a nuisance but I do notice better fuel mileage leaving it on when driving highway speeds.

 

[Jakal]

Going to make another drive today

I will post on how it goes

thanks to everyone for the info

jack

 

[Jakal]

20 mile round trip in city today
First half in 8 option with no issues
Second half in normal drive and no issues either

will try again tomorrow to see what happens

 

[Jakal]

Final report from today’s 50 mile round trip
Felt the truck have the issue twice while in mds normal mode when running around 35mph. Put the truck in 8 mode to bypass mds and never felt it again. Thanks again to ALL who helped me out with the great info and advise

jack