Tri-Link - Common undercarriage rattles?

Discussion in 'KJ General Discussion' started by XWrench3, Nov 21, 2020.

  1. XWrench3

    XWrench3 Full Access Member

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    my '05 liberty has a rattle underneath it in the rear axle area. when i fold the seats down, it REALLY gets loud. is there any common places this happens? i do not think its in the exhaust pipes, as it happens way to much. and what seems odd to me is it does not get louder with the size of the pot hole or bump. i did check the jack/ lug wrench, as that's the only thing in the interior of the vehicle. i guess at this point, the first thing i am going to check is the shock ends, to make sure all 4 of the dampener ends are ok, and that the fasteners are tight.
     
  2. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Ya check shock mounts, are shock bushings still in good shape? Maybe they are not tight?
    Do you have a rear sway bar ? Check that for being tight as well.
     
  3. XWrench3

    XWrench3 Full Access Member

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    yep, shock mounts were what i was expecting, but they all seemed ok. and yes, it does have a rear sway bar, and they are ok too. what is the big "boomerang" thing that holds the rear axle in place? the connections on that look pretty crusty. oh, and the lower rear control arms are new. they still have the Mopar sticker on them! so that's cool. how big of a job ir removing the boomerang link?
     
  4. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    It called a Tri-link. Generally you will get a clunk going on if ball joint is bad, or bushings are shot.

    [​IMG]
    I've never had to replace mine, there are some online how 2 vids, but Tom has done a few.
    See this thread LOL. https://www.jeepkj.com/threads/tri-link-install.46732/
    If you stand on the rear bumper & bounce it up & down, do you hear anything going clunk etc?
     
  5. Doing10to20

    Doing10to20 Full Access Member

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  6. 65Corvair

    65Corvair Member

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    It is not hard to change the tri-link out, if you have a jack, jack stands, and tools. Impact wrench will help if you live in the rust belt.

    It only really has 3 bolts holding it in place. From LibertyTC's picture, there are bolts going through the #2 bushings, then the #5 pinch bolt holding it to the axle. After you remove the pinch bolt, you can tap a metal chisel or a flat head screw driver in the gap to open it up to make it easier to remove.
     
    Doing10to20 and LibertyTC like this.
  7. tommudd

    tommudd Moderator Staff Member Moderator

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    To replace a Tri Link
    remove the sway bar and JEEP balls, toss them, then remove the 3 bolts holding the tri link to the rear diff
    remove the front 2 foreward bolts and remove the whole thing
    That way you can easily get to the pinch bolt, and knock everything apart easily
    Heard of way too many that tried to not remove that bracket and beat their brains out

    ALSO be very careful if you try and spread that one part apart like mentioned above, have received many calls looking for a new bracket after breaking theirs
    At 300 a pop they get expensive, reason I never do that
     
  8. HoosierJeeper

    HoosierJeeper Gold Supporter/Admin Staff Member Administrator

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    The only rattle I've had from the rear of mine was the flipper glass latch. Sprayed some WD40 in it and it shut up right away.
     
  9. XWrench3

    XWrench3 Full Access Member

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    JEEP balls??? do you mean the 2 huge roller looking things on the gearcase by the driveshaft?
     
  10. tommudd

    tommudd Moderator Staff Member Moderator

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    Yes on the rear diff

    Few weeks back I counted up, I have 23 Jeep balls and 31 rear sway bars
    someday will need to load all that up and get rid of it ;)
     
  11. Big Al

    Big Al Let's get Cracken

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    Heard that the park brake shoes delaminate from the backing plate, that may rattle if they came un done.
    Was going to check my park brake shoes a few weeks ago when I installed my snow tires, but ran out of time.
    I have rotors and calipers on the rear for rear brakes and I know some models don't.
     
  12. 65Corvair

    65Corvair Member

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    Tom is correct, care must be taken not to break the pinch bolt bracket.
     
  13. XWrench3

    XWrench3 Full Access Member

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    so the "Jeep balls" are there to reduce driveshaft vibrations, right? i think that was what they said about a similar item on a Cadillac my dad used to have.
    and about the sway bars, i am not a serious off roader, but i have looked thru a few off roader type magazines. serious guys remove sway bars in order to let each wheel move much easier for things like rock crawling and going over large obstacles, right? i think for my driving, i will keep the sway bars. if i want to go serious off road i have an atv quad bike that has true 4 wheel independent suspension, a locked rear axle, with a locker on the front axle for true 4 (or all) wheel drive. its not fast, but it will go more places than i want to go.
     
  14. tommudd

    tommudd Moderator Staff Member Moderator

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    02s have drum brakes in the rear, from there on they are disc in the rear
     
  15. tommudd

    tommudd Moderator Staff Member Moderator

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    REAL SWAY BAR attaches to the suspension/rear diff and also body
    Ours does not, will not hurt a thing
    99% of the lifts I have done the sway bar was attached and could not even tell it
    worthless hunk of metal