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  #1  
Old 04-11-2017, 06:30 AM
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Post Trailhawk Engine Question

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My wife and I are talking about getting a GC Trailhawk. I like the Hemi, but don't like mds, and the thought of waiting and them replacing the hemi with a turbo engine is another option I'd rather not have. It should be interesting to see how this plays out. I want the extra power of a V8 to tow with, dealing with a V8 cutting power to 4 cylinders bothers me after all the problems a friend had with his.

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Old 05-03-2017, 09:03 PM
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Re: 2020 Jeep Grand Cherokee "WL/WK3"

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Originally Posted by demarpaint View Post
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My wife and I are talking about getting a GC Trailhawk. I like the Hemi, but don't like mds, and the thought of waiting and them replacing the hemi with a turbo engine is another option I'd rather not have. It should be interesting to see how this plays out. I want the extra power of a V8 to tow with, dealing with a V8 cutting power to 4 cylinders bothers me after all the problems a friend had with his.
I have a 2011 with the hemi. You cant even tell when it goes in or out of 4 cyl. more. For tow, you want torque, not just HP. That means a hemi.
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  #3  
Old 05-03-2017, 09:36 PM
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Re: 2020 Jeep Grand Cherokee "WL/WK3"

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Originally Posted by demarpaint View Post
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My wife and I are talking about getting a GC Trailhawk. I like the Hemi, but don't like mds, and the thought of waiting and them replacing the hemi with a turbo engine is another option I'd rather not have. It should be interesting to see how this plays out. I want the extra power of a V8 to tow with, dealing with a V8 cutting power to 4 cylinders bothers me after all the problems a friend had with his.
I have a 2011 Ram, and a 2016 GC both with the hemi. The mds system is pretty seamless and barely noticeable. Get the hemi, you wont regret it
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Old 05-15-2017, 11:58 AM
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Re: 2020 Jeep Grand Cherokee "WL/WK3"

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Originally Posted by demarpaint View Post
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My wife and I are talking about getting a GC Trailhawk. I like the Hemi, but don't like mds, and the thought of waiting and them replacing the hemi with a turbo engine is another option I'd rather not have. It should be interesting to see how this plays out. I want the extra power of a V8 to tow with, dealing with a V8 cutting power to 4 cylinders bothers me after all the problems a friend had with his.
I could be wrong but fairly certain if you put it in TOW mode, it disables MDS. But even if Im wrong, a tuner and unlocked PCM can be added and disable MDS altogether...

With that said, I have had (++ multiple family and friends) MANY Chrysler vehicles with MDS going back to 2005 and have never had any issues with it.
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Old 05-15-2017, 12:22 PM
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Re: Trailhawk Engine Question

Keep in mind that there's no guarantee that there will a "Trailhawk" in any specific model year. As to the engines, it appears that there will be a number of reasonable choices. Scott's comment in the WL section that a new version of the Hemi may be on the table is encouraging for folks who like that as compared to a turbo system, but I think it's important to not pre-judge any of these engines until they see the light of day.
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Old 05-15-2017, 12:29 PM
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Re: Trailhawk Engine Question

I have never even noticed MDS activate on my 2016 Hemi. Also, I'm pretty sure that turning eco off will prevent MDS from activating. Having a trailer plugged into the trailer connector probably disables it too.
BTW, on the 2016 and 2017, when you turn eco off (with the button under the hvac controls) it will remain off until you turn it back on. No need to do it each time you start the car.

Forget about MDS and get the Hemi. You won't be disappointed.
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Old 05-15-2017, 02:13 PM
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Re: Trailhawk Engine Question

mds has come a long long ways since its introduction on the 1981 cadillacs. been quite a few years since ive heard of problems with it.
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Old 05-15-2017, 02:24 PM
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Re: Trailhawk Engine Question

I have a Hemi Ram, and a Hemi Jeep GC and have never had an issue with MDS. It is worth noting that MDS will only come on in a specific situation: at lower load and RPM (ie freeway driving). It never comes on during acceleration or anytime you would really notice it. And the "tow" button does disable it (as well as changing the shift pattern). Personally, if it weren't for the little icon in the cluster, I would not even know it was happening.

I too am a big fan of the Hemi, and w/regards to the 2020 changes; I don't think there is any guarantee that the new Hemi will be in a standard GC. The post from Scott said they would be getting rid of the Pentastar, the 5.7, and the 6.4 (keeping the 6.2 aka trackhawk). Replacing would be Hurricane 4, I6, and new Hemi of unknown displacement. Seems reasonable that the Hurricane and the I6 would be the engine choices for standard GC and new Hemi be the SRT. Just my speculation but all Auto companies are feeling the EPA crunch and the only way to get the numbers up is smaller displacement across the volume vehicles. I think if you want a Hemi, you should get one in the next couple of years while it is a sure thing.
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Old 05-15-2017, 04:47 PM
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Re: Trailhawk Engine Question

FYI, only the SRT has a 'tow mode' (and I'm pretty sure it doesn't even have MDS on the 6.4). There is no tow mode or tow button on any of the others.
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Old 05-15-2017, 04:50 PM
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Re: Trailhawk Engine Question

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Originally Posted by DriverDave View Post
FYI, only the SRT has a 'tow mode' (and I'm pretty sure it doesn't even have MDS on the 6.4). There is no tow mode or tow button on any of the others.
Ah ok, was not aware only the SRT had that mode called out... But I am 100% sure the 6.4 most definitely does have MDS when in "Auto" mode.
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Old 05-15-2017, 05:26 PM
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Re: Trailhawk Engine Question

The 6.4 does have mds....but the 6.2 doesnt
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  #12  
Old 05-15-2017, 06:14 PM
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Re: Trailhawk Engine Question

I've driven vehicles from Chrysler and GM with the cylinder deactivation and I can absolutely always tell. The systems have gotten better over the years but I'd want the thing deactivated. While I'm happy with the 3.6, I wouldn't hesitate to get the V8 even with MDS if it were in the cards.
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