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Old 09-25-2010, 01:38 PM   #1
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Question Down hill decent

Hello to all members:

I noticed when driving my 2010 Wrangler Jeep, the auto tranny keeps trying to downshift like an engine breaking device to reduce brake wear. While this function is nice, driving on the back roads around large hills and curves with this function , is driving my tranny crazy. Keeps switching in and out of gears to often. This even happens with the od off as well.

I read in the owners manual that you can turn off the up hill hold function,
DOES ANYONE KNOW ON HERE HOW TO SUSCESSFULLY TURN OFF THE DOWNHILL DECENT MODE.

Would appreciate any feed back, Thanks in advance

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Old 09-25-2010, 03:03 PM   #2
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The transmission needs to be regeared. Mine changes gears between 20-30mph, really annoying at times.

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Old 09-25-2010, 03:45 PM   #3
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I thought the same thing, but sometimes it does not always abrubtly downshift. It can be very annoying when driving. Most vehicles when you let off the acclerator, they coast. I am using more gas than needed with this down hill decent option. I like to coast to red lights and long exit ramps to save fuel and wear and tear on the brakes, anybody else have this issue with their JK?

I read somewhere on here one day, one of the members actually was able to get into some of the JK's programming option via the info display in the gauge cluster.


I wish automakers would stop adding all of this hi-tech crap to our vehicles. It is a Jeep Wrangler not compass or commander.

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Old 09-25-2010, 04:23 PM   #4
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Should have got a Stick. Then you decide what gear to run and when. But on a serious note did you check with the dealer they may be able to reprogram if its electronic but I'm unsure.
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Old 09-25-2010, 05:01 PM   #5
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Quote:
Originally Posted by Sask. Jeep View Post
Should have got a Stick. Then you decide what gear to run and when. But on a serious note did you check with the dealer they may be able to reprogram if its electronic but I'm unsure.
sask.jeep --- Been doing a lot of reading on this , and I see there is a turn - off by doing the wheel dance and pressing the esp button 4 times " some other things as well", shuts off up hill assist for good. I wonder if it is the same for down-hill assist?

Anybody with a 2010 notice their JK holding back going down hills? Is this a part the hill assist system? Mine is acting like a Pickup truck in tow haul mode and feels like the the tranny is holding gear "engine braking" to reduce brake wear.

As I mentioned above, a nice feature , but on country roads, large hills, and turns, the tranny is working against my control on the gas pedal, causing a constant rubber band effect, also making the tranny work harder constantly hunting for the right gear when going up and down mountainous roads.

Thanks in advance for anyone on here with any input
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Old 09-25-2010, 05:53 PM   #6
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I feel the same thing. Instead of coasting it slows down. My dad's Dakota coasts really nice when letting off and so does my car.
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Old 09-25-2010, 06:23 PM   #7
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I've only felt this in one place. It's an unusually steep section of 101 just north of San Luis Obispo. I can set the cruise @ 65 and the Jeep won't run away. I really like the feature.

I've done tons of mountain driving in the California High Sierra and have never felt this effect.

It sounds like you need to take yours in and have it checked out.
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Old 09-25-2010, 06:38 PM   #8
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Originally Posted by carnut08 View Post
I've only felt this in one place. It's an unusually steep section of 101 just north of San Luis Obispo. I can set the cruise @ 65 and the Jeep won't run away. I really like the feature.

I've done tons of mountain driving in the California High Sierra and have never felt this effect.

It sounds like you need to take yours in and have it checked out.

Before I bought my 2010 Sport, I test drove 4 other Wrangler's at different dealers, they had the same feeling. Weird...lol

Maybe it is a Jeep thing. All of my other vehicles I drove would coast after releasing the gas pedal.....
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Old 09-25-2010, 07:00 PM   #9
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Quote:
Originally Posted by SLIM_SNOOPY View Post
Before I bought my 2010 Sport, I test drove 4 other Wrangler's at different dealers, they had the same feeling. Weird...lol

Maybe it is a Jeep thing. All of my other vehicles I drove would coast after releasing the gas pedal.....
What I described is the transmission downshifting to keep the JK Rubicon from exceeding the set speed of the cruise control. In 14,000 miles of driving, there's only that one place I mentioned where this has happened.

Not 'coasting' like a car is an entirely different matter. No 4x4 coasts like a car. It's the nature of the beast and it is a distinct control advantage in the mountains.
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Old 09-26-2010, 09:12 AM   #10
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Mine actually coasts pretty well if you just barely put some pressure on the throttle. When you completely let off, it will slow down very nicely, but like I said, just keep a lttile pressure on the throttle and it coasts very nicely. You may like the feature now that you know how to work with it instead of against it. I like it because we have a big hill around here where the high school is and it's 20mph during school. Jeep maintains the speed allthe way down with no brakes.
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Old 09-26-2010, 09:26 AM   #11
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Mine actually coasts pretty well if you just barely put some pressure on the throttle. When you completely let off, it will slow down very nicely, but like I said, just keep a lttile pressure on the throttle and it coasts very nicely. You may like the feature now that you know how to work with it instead of against it. I like it because we have a big hill around here where the high school is and it's 20mph during school. Jeep maintains the speed allthe way down with no brakes.
I guess it has to do with previous vehicle being a Dodge 3500 heavy duty Truck, weighing close or over 8,500 lbs with the bells and whistles. When you let off the gas when approaching a hill, you simply rolled with gravity. Of course 8,500 lbs had to do with some of that..lol

I will agree with you at times it is nice, on very large hills, no need to touch the brake.

For those wondering how does one switch from a big A$$ truck to a small 2010 Sport Jeep. It is called fuel economy and registration / insurance prices-- through the roof. The Jeep was the only Chrysler Product left that had solid axles to this date. I only drive solid axle vehicles, not going to deal with IFS and their issues when installing a lift kit.

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