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Old 11-20-2012, 11:06 PM   #1
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Need info

Hey guys I am new to the forum and really like all the info here. My question is our new jeep is a 2013 4door auto and when you come to a complete stop and then let off the brake about half the time the best way to describe it is it feels like someone just bumps you in the rear end. Is this normal?

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Old 11-20-2012, 11:11 PM   #2
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I don't have that problem. But....one of the first items I did was turn off hill assist. Maybe that is it?

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Old 11-20-2012, 11:17 PM   #3
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I don't think it's on but I will check that out,thanks
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Old 11-20-2012, 11:31 PM   #4
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I second panthermark... Never experienced what you're talking about with my 2012 JKU. I had an old '94 Mazda B3000 some years back that had transmission trouble left and right... It would slip out of first gear at stops and pop back in rather violently when the revs were picked up. Sometimes it wouldn't need the gas and would do just as you are describing. Just thought I'd give any info I could... New Jeep shouldn't have transmission problems, but who knows... Could be defective...
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Old 11-20-2012, 11:38 PM   #5
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OP I have a 2012 jku also and I know what your talking about I have the same issue. I have noticed the more miles I put on the jeep the less it happens also. and for you guys wandering what it is it is suck a light bump if you dont know your car you will have no clue it even happened.
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Old 11-20-2012, 11:46 PM   #6
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Bump

I had the exact same thing in my 08 Tundra, now I just can't remember what it was. I had to learn on the Toyota forums cause as usuall the dealers played dumb. I'll think of it eventually......
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Old 11-21-2012, 12:01 AM   #7
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It could be the gas shifting in the tank--these things are good for feeling that... Or, possibly a sticky caliper... I wouldn't sweat it.
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Old 11-21-2012, 12:28 AM   #8
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Cool I wish I could remember

Just Google those symptoms you will find it. It's not a Jeep thing. Mind is a blank right now.
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Old 11-21-2012, 07:44 AM   #9
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Wonder if I should try to at least get this documented,want to hold off on letting dealer tear into my new toy!
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Old 11-21-2012, 08:22 AM   #10
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yeah,me too, agree, It could be the gas shifting in the tank--these things are good for feeling that.
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Old 11-21-2012, 11:43 AM   #11
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Odd. My 2010 JKU doesnt do this, but my 2006 Toyota Tacoma does. And its a documented issue with many second gen Tacomas.
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Old 11-21-2012, 11:53 AM   #12
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Quote:
Originally Posted by panthermark View Post
I don't have that problem. But....one of the first items I did was turn off hill assist. Maybe that is it?
OP says their rig is an automatic. Do the automatics come with hill assist?
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Old 11-21-2012, 12:04 PM   #13
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Quote:
Originally Posted by orygun View Post
OP says their rig is an automatic. Do the automatics come with hill assist?
Yes
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Old 11-21-2012, 12:07 PM   #14
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Quote:
Originally Posted by orygun View Post
OP says their rig is an automatic. Do the automatics come with hill assist?
Yup, they do.

I have an auto as well...and why someone would need HSA on an auto beats me....it isn't like you have a clutch to worry about....

But it sounds like he may have a different problem.
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Old 11-21-2012, 03:21 PM   #15
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No lights are coming on; he only notices it from a stop; the tranny is shifting fine... I'll bet it's the gas in the tank. Analyze the issue as you take your tank down to empty--bet it goes away.
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Old 11-21-2012, 04:00 PM   #16
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Thanks again for all the input everyone! What is my 4door jeep wrangler sahara unlimited called on here as far as the initials go? Jku?
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Old 11-21-2012, 04:12 PM   #17
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Unofficially a JKU. All 2007+ Wranglers are "JK's". The "U" isn't an official Jeep designation...but it makes sense for forum talk. Rubi's are known ans JKR's or JKUR's...but Saharas and Sports both share and "S"...so we are not cool enough to get our own designation like the Rubi's....

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