Need help: Rear end "thud/shifting" feeling - JeepForum.com

 
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post #1 of 6 Old 08-02-2013, 12:42 PM Thread Starter
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Need help: Rear end "thud/shifting" feeling

I'm asking for opinions/help on a situation I am having with my '13 JKU. Within the past 3 weeks I have noticed a kind of knocking/sliding feeling like something is moving when I go around a corner in the rear end of my wrangler, more noticible when its a sharper corner. It kind of makes a bump feeling to the one side that I am turning to that I feel in my seat. I took it in to the dealership to be looked at and they said everything "feels" normal. They checked the rear trackbar, swaybar, etc... and said its all good. When i go over bumps i can feel something seems off in the back end too.


The rear axle WAS shifted over to the drivers side a tad, and they said they fixed it however i noticed this morning that it is back to the one side a bit again (rear tire pokes about 1/4 to 1/2" more on drivers side then passenger).

I feel like i am overthinking it, but i KNOW i feel something is different/wrong then before.

It was a dealer installed lift kit, so its not like i did it myself, thats why i took it back since its covered under warrenty.




thanks for any help.


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post #2 of 6 Old 08-02-2013, 12:47 PM
RockyClymer
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Rear track bar suffers the same issues as the front from what I understand. Loose track bar bolt in an oversize hole?

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post #3 of 6 Old 08-02-2013, 01:13 PM Thread Starter
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Quote:
Originally Posted by RockyClymer View Post
Rear track bar suffers the same issues as the front from what I understand. Loose track bar bolt in an oversize hole?
when i got under and grabbed it the other day and tried to shake it i felt no play at all. Unless its one of those things where it has to be jacked up in order to get any movement

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post #4 of 6 Old 08-02-2013, 01:28 PM
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I can't even imagine what they "fixed" with what is probably a factory non adjustable track bar.

Two guesses though...
1- the frame side mount is wallowed out and the just loosened the bolt, pushed the axle over and over-torqued it to try to keep it in one spot, or
2- they used a crappy track bar bracket (could be on the frame or axle side) and it was broken and/or loose.
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post #5 of 6 Old 08-02-2013, 04:37 PM
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Just off the top-

When lifting a JK/JKU, the rear end slides to the PASSENGER side, how much, depends on the lift-

If the rear end is sticking out the DRIVERS side, then the dealer used the WRONG/bkt/trackbar and the rear coils are probably twisted off center and will try to "CENTER" on turns--

Your rear Drive shaft/uni-is probably off center also--sounds like you need a second opinion from a suspension man !

The front axle will slide to the drivers side, again depending on the lift-

Good luck

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post #6 of 6 Old 08-02-2013, 10:59 PM Thread Starter
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Quote:
Originally Posted by brianjw View Post
I can't even imagine what they "fixed" with what is probably a factory non adjustable track bar.

Two guesses though...
1- the frame side mount is wallowed out and the just loosened the bolt, pushed the axle over and over-torqued it to try to keep it in one spot, or
2- they used a crappy track bar bracket (could be on the frame or axle side) and it was broken and/or loose.
They did use an adjustable track bar.

Quote:
Originally Posted by JIMBOX View Post
Just off the top-

When lifting a JK/JKU, the rear end slides to the PASSENGER side, how much, depends on the lift-

If the rear end is sticking out the DRIVERS side, then the dealer used the WRONG/bkt/trackbar and the rear coils are probably twisted off center and will try to "CENTER" on turns--

Your rear Drive shaft/uni-is probably off center also--sounds like you need a second opinion from a suspension man !

The front axle will slide to the drivers side, again depending on the lift-

Good luck

JIMBO
I can fully understsnd this. I'll have to go out and take a peek in the morning to see if i can notice anything with the rear coils and driveshat. What you mentioned now that i think about it i can relate the feeling that i experience to them happening (hopefully that makes sense haha). Im def either gonna take it back, or go to a specialty shop i find and get there opinion and then go back to the dealer.

I know something isnt rught with it, it never did it before. The rear also seems to make more noise and s eem rougher going over bumps and stuff. Assuming this could all be related.... Im amazed the dealership says it feels "normal".

When you say the wrong trackbar, what do you mean?

Thanks for the info and help!!

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