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Old 10-20-2013, 10:04 PM
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Angry '14 JCC Limited Rolls in Park on Steep Hill

Help!

Have any of you parked on a steep hill (I'm guessing abt 45 degrees) and experienced your Jeep rolling ? I parked to let out a passenger- braked, shifted into park with foot still on brake, and then removed my foot from brake at which time the jeep rolled approx 3 feet. Scared my passenger more than me. She thought I had forgotten to put into gear.

I experienced the "Christmas tree effect" on my first trip, and now on this recent trip, twice I experienced the jeep rolling forward while in park on a steep hill. Also frustrating is that because on the first occasion I parked near the curb to let my elderly passenger out, the Jeep rolled into the curb scratching my front passenger wheel. Grrrrr! My '99 JGC has waaay over 200,000 miles w/o a scratch on the wheels.

Also, had a strange situation with the Jeep refusing to shift out of 2nd gear after merging into interstate traffic. Thankfully, it occurred in a rural area with little traffic. It took 2 tries, in pulling over and putting into to park finally resolve theissue.

Have an appoint w dealer tomorrow.

I have a love/hate relationship and serious trust issues with this jeep!

: - /
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Old 10-20-2013, 11:21 PM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

I doubt it was 45 degrees, that's insanely steep. I doubt you'd be letting a passenger off on that kind of grade. It might feel like 45, but it's probably not close to that.

Anyway, thanks for the heads up. I'll watch for it.

My guess is, if it was that steep and you let your foot off break quick, it might not grab.
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Old 10-20-2013, 11:41 PM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Those highway signs that say 7% grade, or 9% or 14%? A 45deg hill is a 100% grade. (1ft over, 1ft up == 100% grade == 45deg)

When it rolled 3ft, what stopped it? Did 'Park' finally catch or ???

"Park" is just a cog in the transmission. If you have the transfer case in neutral, the transmission is not engaged. Or if that cog is broken then obviously Park doesn't do much.
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Old 10-20-2013, 11:57 PM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Quote:
Originally Posted by mswlogo View Post
I doubt it was 45 degrees, that's insanely steep. I doubt you'd be letting a passenger off on that kind of grade. It might feel like 45, but it's probably not close to that.

Anyway, thanks for the heads up. I'll watch for it.

My guess is, if it was that steep and you let your foot off break quick, it might not grab.
Thanks for both replies!

I was certainly guessing about the angle of the grade.....thinking of a 90 degree angle-visually it *seemed* one half that. Regardless, I was visiting a mountainous part of the country in which I have driven many vehicles, and never has an automatic transmission rolled.

I don't know how to post a link to another site, but there is a thread about a 2014 that can not go up a paved driveway. The photo of that steep driveway in that thread is very similar to my steep hill.

just counting on dealer to fix jt.

.
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Old 10-21-2013, 12:03 AM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Did you set your parking brake first? Every automatic I've ever had will roll slightly on an incline after being put in park unless the parking brake was set, and I live in said mountainous areas. My preferred method to not have it roll is to put it in neutral, set the parking brake, shift into park and then take the foot off of the brake pedal.
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Old 10-21-2013, 12:13 AM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Quote:
Originally Posted by Booze_Traveler View Post
Did you set your parking brake first? Every automatic I've ever had will roll slightly on an incline after being put in park unless the parking brake was set, and I live in said mountainous areas. My preferred method to not have it roll is to put it in neutral, set the parking brake, shift into park and then take the foot off of the brake pedal.


No, I did mot set the parking. Brake.

Because I was waiting in the car both times, I stopped with brake, put car in park and removed foot from brake. I only set the parking brake when I am getting out.

I have never had trouble in past, but certainly appreciate you sharing your expertise.

.
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Old 10-21-2013, 12:31 AM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Quote:
Originally Posted by Booze_Traveler View Post
Did you set your parking brake first? Every automatic I've ever had will roll slightly on an incline after being put in park unless the parking brake was set, and I live in said mountainous areas. My preferred method to not have it roll is to put it in neutral, set the parking brake, shift into park and then take the foot off of the brake pedal.


No, I did mot set the parking. Brake.

Because I was waiting in the car both times, I stopped with brake, put car in park and removed foot from brake. I only set the parking brake when I am getting out.

I have never had trouble in past, but certainly appreciate you sharing your expertise.

.
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Old 10-21-2013, 12:42 AM
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Quote:
Originally Posted by B6770S View Post
No, I did mot set the parking. Brake.

Because I was waiting in the car both times, I stopped with brake, put car in park and removed foot from brake. I only set the parking brake when I am getting out.
It is very stressful on the transmission to allow the parking gear to hold all the load on a steep grade. Taking your foot off the brake and letting it roll forward until the parking gear stops it is even worse. . Putting a vehicle in park while rolling has the same affect. Hopefully the park gear wasn't damaged
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Old 10-21-2013, 12:43 AM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Every auto I've owned will roll a bit even when it's in "Park". I never tested how far it will go. I just notice the roll and immediately push the brakes or parking brakes.
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Old 10-21-2013, 08:10 AM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

This will always happen, to some extent, with any car. However this is not good, read below to prevent the roll and tranny damage.

Always set the parking brake when stopping on a hill if your going to take your foot off the brake. If you are getting out or not makes no difference.
The transmission is not meant to hold the vehicle in place.
The weight of the vehicle resting on the transmission can make it difficult to take back out of park. This can damage the transmission or linkage.

P.S. When you are getting ready to drive again be sure you put the vehicle in gear (with foot on brake) before releasing the parking brake.
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Old 10-21-2013, 11:15 AM
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Re: '14 JCC Limited Rolls in Park on Steep Hill

Quote:
Originally Posted by B6770S View Post
Thanks for both replies!

I was certainly guessing about the angle of the grade.....thinking of a 90 degree angle-visually it *seemed* one half that. Regardless, I was visiting a mountainous part of the country in which I have driven many vehicles, and never has an automatic transmission rolled.

I don't know how to post a link to another site, but there is a thread about a 2014 that can not go up a paved driveway. The photo of that steep driveway in that thread is very similar to my steep hill.

just counting on dealer to fix jt.

.
I know what thread you are talking about. That was pretty steep.

If it was that steep, like others said, even if your in the car it's really hard on it, putting all that weight on the transmission. And it will be really hard on it, getting it back out.

I don't usually set the parking break, but I would on that kind of hill no matter how long or if I stay or not, because I know it's hard on the parking prong.

Also, I'm not saying you did this, I never "change anything" while someone is getting in or out. Especially on any incline. If you're in gear with foot on break, stay that way until they are clear. It's easy to make a mistake doing anything, so don't do ANYTHING while they get in or out. I usually won't let people get in or out while in gear. But occasionally it happens.

On hill like that I would probably not let them get in or out period. Doors tend to slam into shins and hands on inclines like that. But if I had to I probably would set parking break and put it in gear. I'd find a level spot or turn truck or something.

Oh trick to steal some ones photo.

Quote the Reply and Choose "view source" if they are not attached and you can usually find the photo
If attached right click on thumbnail and choose "Copy Shortcut".

I think this is the one you are talking about and he measured it at 19-23 degrees.

http://www.jeepgarage.org/attachment...8&d=1381369945
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