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  #1  
Old 11-23-2015, 03:31 PM
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Jeep rolls away

I had backed into my sonís driveway to unload some stuff. We got it downstairs and put some stuff away which took around an hour.
When I got back upstairs his wife commented that I really shouldnít park across the sidewalk. I laughed and said nice try. But she was serious. Sure enough my Jeep had rolled down the driveway. It rolled around 6 feet. Now when I backed in I noticed it was a bit slippery because of the snow and ice. So I figured maybe thatís the reason. But then I thought thatís impossible.
Then around 30 minutes later it had rolled another 3 feet and the front tires were on the road.
So now Iím really getting concerned. So I backed it up the driveway put it in park and shut it off.
Got out closed the door and waited and sure enough in 10 seconds it started to roll down the driveway.
It did it 4 times.
The Jeep dealership couldnít replicate the problem today and even after I showed him the car and driver article about this issue he said there werenít any TSB or recalls related to it.
Sure is concerning.

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  #2  
Old 11-23-2015, 04:12 PM
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Jeep rolls away

Take pictures and or video if you can and open a case right away with customer care. It's the only way to prove your having this problem. They can push the dealer to find the cause of your problem. Document everything!!! Days you called in, who you spoke to, etc...and make sure you tell them it's a major safety concern to you and your family and you no longer feel safe. If that fails find out who your regional rep is and get them involved. They have authority to get you out of that jeep for a refund or replacement vehicle.


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Old 11-23-2015, 04:50 PM
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Re: Jeep rolls away

There have been a few threads on this. It was thought that this could be an issue on slippery surfaces because the AWD system will allow one wheel to rotate if it has no grip, the rest will roll forward.

Are you using the park brake as well as putting it in park?

roll away
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  #4  
Old 11-23-2015, 08:57 PM
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Re: Jeep rolls away

The "E Brake" Benn0

Gravity it's really important when documenting this that you get simultaneous footage from the left and right sides showing if wheels are turning, and how many.

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  #5  
Old 11-27-2015, 05:09 PM
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Re: Jeep rolls away

Quote:
Originally Posted by Gravity View Post
I had backed into my sonís driveway to unload some stuff. We got it downstairs and put some stuff away which took around an hour.
When I got back upstairs his wife commented that I really shouldnít park across the sidewalk. I laughed and said nice try. But she was serious. Sure enough my Jeep had rolled down the driveway. It rolled around 6 feet. Now when I backed in I noticed it was a bit slippery because of the snow and ice. So I figured maybe thatís the reason. But then I thought thatís impossible.
Then around 30 minutes later it had rolled another 3 feet and the front tires were on the road.
So now Iím really getting concerned. So I backed it up the driveway put it in park and shut it off.
Got out closed the door and waited and sure enough in 10 seconds it started to roll down the driveway.
It did it 4 times.
The Jeep dealership couldnít replicate the problem today and even after I showed him the car and driver article about this issue he said there werenít any TSB or recalls related to it.
Sure is concerning.

Actually, it's NOT impossible. When you drove into the driveway, the tires were relatively warm. That, in turn started to melt the snow under the tires, which, in turn, caused the snow behind the wheels to melt, then gravity took over, and off you slid.

I realize that MANY will claim I'm FOS, but believe me, it happened to me once, about 30 years ago, in the parking lot where I worked......
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Old 12-01-2015, 03:40 PM
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Re: Jeep rolls away

Should have mentioned this in the original post.

In my case the front wheels were turning in the direction that it was rolling.

The driver rear was turning as well. My son said the same thing was happening on the passenger side.

Everything has been documented on the service reports so I shouldnít have any issues if the problem returns.

I canít replicate the issue either. And itís not from lack of trying.
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Old 12-03-2015, 10:57 PM
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Re: Jeep rolls away

Quote:
Originally Posted by antsjeep View Post
Take pictures and or video if you can and open a case right away with customer care. It's the only way to prove your having this problem. They can push the dealer to find the cause of your problem. Document everything!!! Days you called in, who you spoke to, etc...and make sure you tell them it's a major safety concern to you and your family and you no longer feel safe. If that fails find out who your regional rep is and get them involved. They have authority to get you out of that jeep for a refund or replacement vehicle.


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Old 12-04-2015, 01:24 PM
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Re: Jeep rolls away

Quote:
Originally Posted by Gravity View Post
Should have mentioned this in the original post.

In my case the front wheels were turning in the direction that it was rolling.

The driver rear was turning as well. My son said the same thing was happening on the passenger side.

Everything has been documented on the service reports so I shouldnít have any issues if the problem returns.

I canít replicate the issue either. And itís not from lack of trying.


Sounds like the "parking pawl" in the transmission isn't engaging. I had this happen on a 1985 Firebird that I bought new, in the spring of 1985. The first time I parked the car on a slight incline, the day after I picked it up, the car started to roll. Took it back to the dealer, they checked it, and said the "pawl" wasn't engaging completely in whatever rotating part of the transmission it engages in, so the wheels were free to turn.
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Old 12-04-2015, 04:17 PM
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Re: Jeep rolls away

Quote:
Originally Posted by Gravity View Post
Should have mentioned this in the original post.

In my case the front wheels were turning in the direction that it was rolling.

The driver rear was turning as well. My son said the same thing was happening on the passenger side.

Everything has been documented on the service reports so I shouldn’t have any issues if the problem returns.

I can’t replicate the issue either. And it’s not from lack of trying.
I'm not trying to be an ass, but this is exactly why I always use the park brake except in my own level garage.

I'm guessing one of the tires started to slip on the ice allowing the AWD system to 'slip' and allow the other tires to rotate. Kinda like if you have an old RWD car/truck up on a lift with the transmission in park, you can still rotate the rear wheels.

It's not a 'defect', it's just how the mechanical systems work.

Oh, and auto trans park pawls can break. Some POS minivan rolled into my Audi because of that.
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Old 12-04-2015, 04:24 PM
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Re: Jeep rolls away

Quote:
Originally Posted by Todd3.6 View Post
I'm not trying to be an ass, but this is exactly why I always use the park brake except in my own level garage.

I'm guessing one of the tires started to slip on the ice allowing the AWD system to 'slip' and allow the other tires to rotate. Kinda like if you have an old RWD car/truck up on a lift with the transmission in park, you can still rotate the rear wheels.

It's not a 'defect', it's just how the mechanical systems work.

Oh, and auto trans park pawls can break. Some POS minivan rolled into my Audi because of that.
[Hopefully we avoid a flame war here]

With a transmission in park, the wheels should not slip, period. This really is a product defect, where if Jeep doesn't deal with it can end up in a recall as folks start reporting it to the usa gov't. There have been recalls for far less serious issues. Just wait till someone's Jeep runs over a kid and gives CNN something to ratchet jaw about for a few days.

Having said that, the lawyers may have been responsible for adding the note in the
owners manual to set the parking brake when in park. And I do agree with you that this is a good idea, but then I'm one of those highly unusual people who RTFM.

A grouchy old man might ask why the freakin vehicle doesn't do this for you, since someone went to the trouble to put it in the manual. An electrically activated [but not held] parking brake would deal with this.

In the old days, the note about parking brake was to protect the rather fragile parking pawls on older automatic transmissions. No clue how robust the ones in the two ZF models are.
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Old 12-04-2015, 07:28 PM
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Re: Jeep rolls away

This is a known issue.

"The National Highway Traffic Safety Administration announced late Monday that it will open a preliminary investigation into 408,000 2014Ė2015 Jeep Grand Cherokee SUVs, after receiving several complaints about the vehicles rolling away after being shifted into park."


NHTSA Probes Jeep Grand Cherokee for Rolling When Parked ‚Äď News ‚Äď Car and Driver | Car and Driver Blog



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