Rear end pop/clunk

Discussion in 'KJ General Discussion' started by HoosierJeeper, Nov 25, 2015.

  1. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    Past few weeks I've noticed a pop/clunk from the rear. It only happens on the compression stroke when both rear wheels go over the same bump exactly the same (like hitting a speed bump quickly). Looked at the tri link and can't seem to find any play in it. I rocked the KJ back and forth while watching it and it didn't move. Also tried prying it up with a pry bar and nothing. Noticed the driver's rear shock is covered in a heavy mist/sludge. There are also rub marks in the wheel wells from the tires hitting.

    If it isn't the trilink, could it be that it's just bottoming out and the shocks are shot? I've blown shocks on the KJ before but it doesn't feel bouncy this time.
     
  2. megatone

    megatone Full Access Member

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  3. megatone

    megatone Full Access Member

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  4. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    Could you feel the clunk when driving?
     
  5. megatone

    megatone Full Access Member

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    Yes, I could feel the clunk.

    What you can do is fold a towel a couple times and shut it in the door jamb......just like wedging something in the door to give it some tightness.
     
  6. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    Tried shoving a rag in there to tighten it up and no dice. When I inspected the trilink for play, I did notice the driver's side rear shock was covered in fluid, it was caked on there, probably about 1/16" of an inch deep, if not more. Passenger side shock is completely dry. Could that shock be blown and be the source of the clunk? I will get pics of it tomorrow. Is there a test I can do? It doesn't seem to bounce a whole lot.
     
  7. ltd02

    ltd02 Comfortably numb KJ Supporting Member

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    I'd definitely replace the rear shocks and see if it helps. Needs to be done anyway. A leaking shock is a bad one and could be the culprit.
     
  8. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    Anyone have any comments on how to check the trilink for play or other symptoms that come with a bad trilink?
    Here's a pic of the questionable shock.
    [​IMG]
     
    Last edited: Dec 5, 2015
  9. ltd02

    ltd02 Comfortably numb KJ Supporting Member

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    Yikes. That looks like it is toast. As for the trilink I think you can get a pry bar up in there and try to move it. It shouldn't move much if any.
     
  10. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    I tried prying with a pry bar and rocking the KJ back and forth while watching it, didn't move at all.
     
  11. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    No That Shock IS.....[​IMG]
    Replace both rear shocks. Considering the Monroe coil overs there HJ?
    [​IMG]
    Get the shocks done and go from there, sounds like your tri-link is still ok.
     
    Last edited: Sep 17, 2017
  12. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    I think I might go with the load levelers. I don't tow or haul much but I always thought the Bilsteins were a little soft. This is the second pair of Bilsteins I've had that have gone bad in less than 40k. Are these the right ones?
    http://www.rockauto.com/catalog/moreinfo.php?pk=2215748&cc=1384602&jnid=577&jpid=74
    Thanks for the help guys. I'll check the trilink again but yeah I didn't see any play in it. How long do they typically last? Got about 145k on mine.
     
    Last edited: Dec 5, 2015
  13. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Yup 58649 -If you are wearing the rears out go for it!
    link: http://www.jeepkj.com/forum/f203/monroe-load-adjusting-shocks-installed-56297/
    The tr-link develops cracks in bushings and the upper ball joint is the real clunker.
    It can hold together or not. Get your shocks in which is easy & see what happens.
    Hopefully the tire wont rub anymore, are your lower control arms solid, good bushings?
     
  14. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    They should be, they got replaced in the recall a couple years ago (with new arms)
     
  15. tommudd

    tommudd Moderator Staff Member Moderator

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    Compare prices at shockwarehouse as well
    Thats where I get a lot of my shocks for anything but OME / Ironman lifts
     
  16. Cpt Marvel

    Cpt Marvel Full Access Member

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    What are y'all calling a "tri link"? The upper control arm?
     
  17. ltd02

    ltd02 Comfortably numb KJ Supporting Member

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    Yes. Rear UCA
     
  18. Cpt Marvel

    Cpt Marvel Full Access Member

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    Ok. Thought so. Had a good fight changing mine. The 3 bolts that hold the upper mount to the top of the diff appear to have been put in with heavy duty lock-tite. Quarter turn at a time...
     
  19. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    [​IMG]

    Here's a vid of the tri link.
     
  20. tommudd

    tommudd Moderator Staff Member Moderator

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    You mean these 3 bolts
    [​IMG]

    Yes they have locktite from the factory and should have some installed when you replace them.
    Well unless like mine that was removed weekly at least for a while :happy175:
    My battery powered high zoot gun brings them off easily:icon_lol:
     
    Last edited: Dec 6, 2015