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-   -   Overland question (http://www.jeepgarage.org/f107/overland-question-23850.html)

jp467 05-31-2011 01:30 PM

Overland question
 
Every once and a while I get a feeling when taking off from a stop like something is engaging in the rear. I have the 5.7 overland. Does anyone else have this. I have a feeling it is normal but just wanted to see if others have noticed this.

chiscoe@msn.com 05-31-2011 02:54 PM

Re: Overland question
 
Quote:

Originally Posted by jp467 (Post 422841)
Every once and a while I get a feeling when taking off from a stop like something is engaging in the rear. I have the 5.7 overland. Does anyone else have this. I have a feeling it is normal but just wanted to see if others have noticed this.

Mine does the exact same thing. I am wondering if in my case there was a small bump in the road that as I took off from a stop, I hit that small bump and it made it feel like that. But now I am worried it may be something slipping that is engaging.

mjw930 05-31-2011 04:18 PM

Re: Overland question
 
I get that too, it feels like the torque converter engagement isn't linear meaning it slips then grabs or the ELSD in the rear is engaging with a delay. Since this is my first Chrysler product I have no idea if this is normal with the Hemi and the 545 trans. I plan on discussing it with the dealer when I go in for my first service.

jp467 05-31-2011 04:43 PM

Re: Overland question
 
Quote:

Originally Posted by mjw930 (Post 422892)
I get that too, it feels like the torque converter engagement isn't linear meaning it slips then grabs or the ELSD in the rear is engaging with a delay. Since this is my first Chrysler product I have no idea if this is normal with the Hemi and the 545 trans. I plan on discussing it with the dealer when I go in for my first service.


I have read of a few people having this and I was thinking the same things torque converter or the rear limited slip. I am thinking it might just be something normal for this vehicle. My first wk2 did not do it but that was the V-6 with a different trans in it. I have not towed anything heavy yet so I don't know if that will make it more noticable or not.

mjw930 06-01-2011 09:37 AM

Re: Overland question
 
Quote:

Originally Posted by jp467 (Post 422901)
I have read of a few people having this and I was thinking the same things torque converter or the rear limited slip. I am thinking it might just be something normal for this vehicle. My first wk2 did not do it but that was the V-6 with a different trans in it. I have not towed anything heavy yet so I don't know if that will make it more noticable or not.

To clarify, mine only does it on hard acceleration from a stop when I'm not pulling my trailer. When I pull my trailer the power delivery is linear.

There's one other thing mine does when I'm not towing that feels like something with the TC, I get a shudder, for lack of a better term, when throttle input is DECREASED. It feels like as the power goes from forward motion to engine braking the TC is locking and unlocking. It's best equated to a feeling of driveline lash and it only happens when decelerating without a heavy load. It's most evident on flat terrain, going up or down a hill seems to make a difference.

Having never owned a vehicle with this power train I have no point of reference. I do know that my last 4 Trucks/SUVs (Ford, Porsche, Chevy, VW) didn't do this.

jp467 06-13-2011 06:20 PM

Re: Overland question
 
Anyone have any update on this issue? I felt it a couple times today when I was driving.

1200RT-P 06-13-2011 10:21 PM

Re: Overland question
 
i notice this every once in awhile. maybe a trip. very quick slip under initial acceleration.

i figured it was just me noticing it, since this is my first auto trans car in several years.

litespeedz 06-18-2011 11:13 PM

Re: Overland question
 
This was one of the things my vehicle just went back into the shop for. I'm going to post an update on that trip in my on-going thread. But for this issue here is what happened:

My vehicle has had the front axle isolators replaced, DTCM replaced, DTCM reflashed several times, torque converter replaced, and driveshafts replaced. After the latter two were complete the car drove nicely for about 500 miles or so. It started having issues again so I brought it back.

The Service Manager called an engineer in from Chrysler to drive my vehicle. The Service Manager drove a new car off the lot and said it was great. He drove my car and told me he thought the drivetrain was rough to say the least. The Engineer told him that this sensation is the MDS activating and de-activating. When the Eco light is on, the car is in 4 cylinder mode. But the car can be in 4 cylinder mode and the Eco light will not be on. The engineer told him that the inertia change associated with engaging/disengaging large displacement cylinder heads was difficult for them to shield from the driver. They did what they could on this generation but hope to address better on future models, although they do not know how. The engineer said that all of the Hemi engine vehicles have this characteristic and they are getting a lot of complaints about it. He said it is within the design parameters of the vehicle.

My Service Manager asked why the one on their lot drove so great. The engineer told him that the torque converter does not start to break-in its lock-up for 1,000 - 2,000 miles so drivers will not feel the normal characteristics of the car until then. My vehicle operates as designed; all the uneven drivetrain engagements, surging on the highway, and chugging during coasting is normal.

I was really happy that my Service Manager was so thorough. He asked a very important question about the difference between just delivered and broken-in. I am not surprised that Chrysler said this is normal, BUT, I am surprised as to why. So basically if I want to know what I can expect from my brand new Chrysler product I need to drive one with a few thousand miles on it so I can see how it will actually drive? Call me crazy, but I'm used to cars that drive better after they have broken in - not sloppier. And since my new torque converter is just starting to break-in this implies that it will only get worse.

mjw930 06-19-2011 09:08 AM

Re: Overland question
 
litespeedz, thanks for this great post!

To this point the ONLY thing that has taken some of the luster off the Overland is this crude drivetrain functionality. I might expect it in a truck but not in a $45K luxury SUV.

We can continue to hope they come up with a solution but IMHO they can't until they change over to a different transmission / torque converter design. It may also explain why the V6 owners aren't complaining!

It's not enough for me to jettison the vehicle but I WILL be replacing it with an SRT8 when finances allow.

jp467 06-19-2011 11:52 AM

Re: Overland question
 
It would be nice if the mds could be disabled. I think the milege increase for this feature was only 1 mpg. In my opinion not worth it.

1200RT-P 06-19-2011 11:55 AM

Re: Overland question
 
Quote:

Originally Posted by jp467 (Post 433716)
It would be nice if the mds could be disabled. I think the milege increase for this feature was only 1 mpg. In my opinion not worth it.

tow/haul mode?

mofeen 06-19-2011 09:28 PM

Re: Overland question
 
Quote:

Originally Posted by mjw930 (Post 433649)
litespeedz, thanks for this great post!

To this point the ONLY thing that has taken some of the luster off the Overland is this crude drivetrain functionality. I might expect it in a truck but not in a $45K luxury SUV.

We can continue to hope they come up with a solution but IMHO they can't until they change over to a different transmission / torque converter design. It may also explain why the V6 owners aren't complaining!

It's not enough for me to jettison the vehicle but I WILL be replacing it with an SRT8 when finances allow.


Haha. I drive a WK2 Overland, but 45K luxury SUV? I would certainly not call it that. 45K is not much these days. I mean a fully optioned Edge is near the same price and certainly not luxury. You have to have realistic expectations of the vehicle.


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