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2015 Jeep Grand Cherokee srt problems

38K views 32 replies 17 participants last post by  El Jefe 
#1 ·
Hi members
I have not long taken delivery of a 2015 jeep srt. It's been doing some crazy things but the biggest problem is a vibration felt through the steering wheel and chassis when vehicle is coasting and at around 1500rpm in gears 5-8. Doesn't matter if you doing 60km or 110km. As soon as torque is applied the vibration goes away. Dealer tells me it's the mds working. Is anyone else experiencing this problem?
 
#4 ·
2,282 on mine and same problems you are reporting. The MDS should ONLY work with the Eco mode button selected WTF were they thinking. I may buy a tuner just to shut it off its that annoying. The noise cancellation though the audio system is a total joke, it does nothing to reduce the sound. It like driving down the road with only the back windows down, you know that awful pounding you get in your ears. Total fail on jeeps part.


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#5 ·
FWIW, what they were thinking is trying to attempt to meet increasingly restrictive EPA MPG standards. If the MDS was deactivated entirely until the button was pushed, that would lower the apparent MPG under "normal operation".

Note that in "Auto" select-trak mode, even if you shift to "S" transmission mode, the MDS will still activate with the Eco button OFF. You have to select "Sport" mode on the Select Trak dial in order to completely deactivate the MDS.

Kind of confusing and I agree it's a bit annoying. I actually mind the MDS (since I know what it is and what it's doing) a lot less than the host of other issues the vehicle has.
 
#7 ·
I'm not sure what you all are talking about? When I go to work tomorrow I'll keep this in mind and let you know what happens on mine. I just went over 1800 miles on my 2015 JGC SRT.


Are all talking about the drag like the vehicle doesn't seem to coast when you let off the gas?
 
#8 ·
That's not drag, that's the gearing/engine braking. Performance vehicles don't coast unless you're in neutral. When you let your foot off the pedal the transmission stays in the gear that will have the most available power at the vehicle's current speed.


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#10 ·
Yes it's correct I had have the same problem. Try putting gearshift into sports mode (flag will light up on dashboard) and problem disappears. It seems jeep MDS design is not very sophisticated
Remember MDS cuts off cylinders by not actuating valves. Essentially turn you ending into a pump
My Hyundai van has a better MDS than jeep!


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#16 ·
In my opinion, that was really one of the only parts of the car I didn't like when I test drove it. It reminds me of the Bronco I had in college which would decelerate at an alarming rate when you took your foot off the gas; however that was due to aerodynamics and bad bearing rather than programming. I don't mind costing.
 
#17 ·
Hi guys one of my first contributing posts on here. Hello to everyone and thanks for all the great info on here!

To OP, has this issue been resolved for you?
I have just purchased a March 14 build GCSRT and has done 37k kms.
When test driven the dealer let me drive around the back streets of the area of the dealership and really only hit 80km/hr.
I bought the beast, got straight onto the freeway and full vibration through the car at 95-120 km/hr.
I called them within 5 mins of driving away.
So went in for first maintenance issue 5 days after owning. I told them I believed it was either front diff bushes or cv on the main driveshaft to the front diff. It just had all the signs and could feel the vibration through the passenger floor (Aus left side).
Anyway they had it for 2 days, didn't bother checking any of that, then fixed a heat shield on the exhaust and told me the problem was solved come pick up your car.
I pick the car up and drive away and back on the phone in 5 mins, they had fixed nothing and exact same issue was still very much there and easily recognised to anyone who came in the car with me.

Another appointment made 3 days later and this time they actually removed the front driveshaft from the TC / front diff.
One of the cv's on the shaft had no grease in it from factory and was completely stuffed knocking and grinding as I manually moved it around on the driveshaft in my hands. No wonder the car had such bad vibration!

The dealer has ordered a new one and I am still driving the car in 2 wheel drive.
What a revelation, now the car drives sooooo much better like it should. Vibration gone at this point.

Now I am focusing on the tyre drone and slight vibration from the Pirelli run flats on the front. They are being replaced with Falken S/TZ05 to match the rears the previous owner had installed.

Hopefully once new shaft is installed, tyres installed, I will be vibration free!

I hope this helps and gives you something for your dealer to look at.
Anth
 
#19 ·
Hey MexicanBatman!
haha they think I am a respectable business man and would do no such thing!!
Besides....that is what my 620rwkw FG GT is for!!!
Yes I am AnthGT335 from AFF :)

I bought the SRT to tow my GT for times when I have the full rollcage bolted in and cannot drive it on the roads like that.

I must say I am loving the SRT! 2 wheel drive is fun!

cheers
 
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