1. #1

    Yj Wobble (not DW) just wobble

    I have a 90 yj, 2 1/2" suspension lift, boomerang shackles rear, tow shackles front, quick disconnnect swaybar, no steering mods. I have noticed a side to side wobble upon hitting bumps especially on corners at moderate speeds. I intend to check out the front suspension... but a place to start or things to look for would be nice.. thx for the help.
    Politics is supposed to be the second oldest profession.
    I have come to realize that it bears a very close
    resemblance to the first.

    Ronald Reagan

  2. #2
    Join Date
    Jan 2004
    Location
    Blacksburg/Williamsburg VA
    Posts
    2,573

    Re: Yj Wobble (not DW) just wobble

    Possibly unit bearings, ball joints, spring bushings, or tie rod ends.
    06 VW (hardcore crawler)

    "The mountains are calling and I must go." -John Muir

  3. #3

    Re: Yj Wobble (not DW) just wobble

    Thats along the lines I was thinking, but reassurance is always good, thx.
    Politics is supposed to be the second oldest profession.
    I have come to realize that it bears a very close
    resemblance to the first.

    Ronald Reagan

  4. #4

    Re: Yj Wobble (not DW) just wobble

    Is it a wobble, or a jerking of the steering wheel when hitting a bump?

    Sounds like bumpsteer, generally caused by the draglink and trackbar not being parallel.

  5. #5

    Re: Yj Wobble (not DW) just wobble

    Quote Originally Posted by Bounty__Hunter View Post
    Is it a wobble, or a jerking of the steering wheel when hitting a bump?

    Sounds like bumpsteer, generally caused by the draglink and trackbar not being parallel.
    Its not an up and down wobble like DW, its more like a side to side wiggle that lasts for a very short time, but makes the steering uncontrolable during that short time. Hope thats clear enough.
    Politics is supposed to be the second oldest profession.
    I have come to realize that it bears a very close
    resemblance to the first.

    Ronald Reagan

  6. #6
    Join Date
    Aug 2007
    Location
    Allegan,Michigan
    Posts
    14

    Re: Yj Wobble (not DW) just wobble

    I Thougth Death Wobble Was Side To Side And Did Cause Uncontrolable Steering? Checkthe Tires For Balance Or Steering Stabilizer

  7. #7

    Re: Yj Wobble (not DW) just wobble

    From my understanding of DW, limited understanding, a true DW will only stop by slowing to a near stop, this is a very fast wobble that comes and goes upon hitting a bump, and if in a corner, it makes the jeep want to "jump" with the sideways g forces. I just want to narrow this down to the best of my (and fellow readers) abilities. I am looking for all suggestions before I tear into this on Saturday.
    Politics is supposed to be the second oldest profession.
    I have come to realize that it bears a very close
    resemblance to the first.

    Ronald Reagan

  8. #8
    Join Date
    Dec 2006
    Location
    San José, Costa Rica
    Posts
    1,693

    Re: Yj Wobble (not DW) just wobble

    I agree with bounty; the fact that it happens when you hit a bump leads me to bump steering....

    '94 YJ 2.5L, Sperwinch EPi 9.0, RE 4" Std Lift, Adv. Ad. SYE, Woody Shafts, Alloy Axles, ARB Lockers, 4.88 gears, 62mm TB & Spacer, 165A Alternator, Griffin 3" Aluminum Rad, Taurus e-fan w/ DC Controller, Borla Cat-Back, Flowmaster hiflow cat, PD Ignition, 19# injectors, Adj. FPR (42PSI), MOPAR cam, Safari Snorkel, 33" BFG KM2, 15" AR wheels, Xenon H4 lights, KC Daylighters & Slimlites, Sony sound, Pavement Ends Targa Top, Hanson Front Bumper, JCR Offroad rear, AtoZ Rockers, Rhino lined Tub.

  9. #9

    Re: Yj Wobble (not DW) just wobble

    I was simply trying to narrow it down, as DW in YJ's and other leaf sprung vehicles is rare (aren't TJ owners lucky)

    A bump can induce DW, but it is more violent than bumpsteer. Bumpsteer is simply the steering wheel turning sideways as the front suspension compresses, then returning to center.

    Can you narrow it down from a 'side to side wobble'? If it's violent and requires slowing down to stop the wobble, it's DW. If it is not violent and ends as quick as it starts, it is likely something else.

    I would start by going through and tightening all the hardware related to the installation of the lift. Then watch all steering components as somebody cycles the steering wheel from lock to lock, and bounces it back and forth against full lock quickly.

  10. #10

    Re: Yj Wobble (not DW) just wobble

    hmmm, check the unit bearings and also see how much play you have in the rear wheel bearings. mine were going bad and let the rear axle shafts slide in and out about 1/4 an inch caused lots of weird steering issues. like the rear end was slideing when i was comeing out of a turn. the axle shafts are not supposed to move in and out . if so then its time for rear wheel bearings and seals. hope this helps
    88 yj sahara, SBC 350/TCI MAXIMIZER TH350. Rubicon Express 4.5 extream duty lift. Edelbrock AVS 4x4 carb 3" body lift. SmittyBuilt rock crawler front bumper. Hurst Pro-Matic 2 shifter. And a bunch of other stuff.

  11. #11
    Join Date
    Aug 2003
    Location
    Englewood, Colorado
    Posts
    914

    Re: Yj Wobble (not DW) just wobble

    When you said that you haven't modded any steering components does that mean that you have the stock pitman arm? You may want to try a dropped pitman arm. You can get them on eBay for $45 bucks or so. Most rental joints carry pitman arm pullers as do auto parts stores.

    That will get your drag link and pitman arm into much better alignment (geometry).

  12. #12

    Re: Yj Wobble (not DW) just wobble

    After driving freeway speeds again yesterday Im noticing a side to side motion of the steering wheel at high speed, I have some great ideas of where to start due to all of you, Ill let you know what I find come Saturday afternoon.
    Politics is supposed to be the second oldest profession.
    I have come to realize that it bears a very close
    resemblance to the first.

    Ronald Reagan

  13. #13
    Join Date
    Dec 2006
    Location
    San José, Costa Rica
    Posts
    1,693

    Re: Yj Wobble (not DW) just wobble

    Ahhh... Nothing like a long weekend to spend under the Jeep!

    '94 YJ 2.5L, Sperwinch EPi 9.0, RE 4" Std Lift, Adv. Ad. SYE, Woody Shafts, Alloy Axles, ARB Lockers, 4.88 gears, 62mm TB & Spacer, 165A Alternator, Griffin 3" Aluminum Rad, Taurus e-fan w/ DC Controller, Borla Cat-Back, Flowmaster hiflow cat, PD Ignition, 19# injectors, Adj. FPR (42PSI), MOPAR cam, Safari Snorkel, 33" BFG KM2, 15" AR wheels, Xenon H4 lights, KC Daylighters & Slimlites, Sony sound, Pavement Ends Targa Top, Hanson Front Bumper, JCR Offroad rear, AtoZ Rockers, Rhino lined Tub.

  14. #14

    Re: Yj Wobble (not DW) just wobble

    My money is sitting on it being unbalanced tires, but it could be something else simple like the front end being out of alignment.

    I doubt it is related to the trackbar and drag link being misaligned. The trackbar is mounted in a fixed location and not adjustable. This leaves me to believe that it is one of the above mentioned issues.

    Did you lose a wheel weight? Are your front tires unevenly worn? Did you whack a curb or rock knocking the front end out of adjustment? All three?

    (edit) as for the pitman arm, you should not need one with a 2.5" lift. If those shackles are really tall then maybe, but even then it wont cause the problem you have. I ran my BDS 3.5" kit on a YJ years ago and waited about a month before adding the drop pitman arm. It made no noticeable difference in drive-ability.

  15. #15

    Re: Yj Wobble (not DW) just wobble

    Quote Originally Posted by jfrabat View Post
    Ahhh... Nothing like a long weekend to spend under the Jeep!
    Lmao, too true, but I dont have the back for it anymore, Ive had two back surgeries in the last five years, and I was hoping to do this quick like. Oh well. I do miss turnin wrenches and ending up with xtra supluferous parts . Twisted, i read your above input and I think I will stop at Big O and have them check tires b4 I get too deep in breaking things. Thanks again gang for the input.
    Politics is supposed to be the second oldest profession.
    I have come to realize that it bears a very close
    resemblance to the first.

    Ronald Reagan

  16. #16
    Join Date
    Dec 2006
    Location
    San José, Costa Rica
    Posts
    1,693

    Re: Yj Wobble (not DW) just wobble

    Quote Originally Posted by TwistedCopper View Post
    (edit) as for the pitman arm, you should not need one with a 2.5" lift. If those shackles are really tall then maybe, but even then it wont cause the problem you have. I ran my BDS 3.5" kit on a YJ years ago and waited about a month before adding the drop pitman arm. It made no noticeable difference in drive-ability.
    Ditto... I drove my RE 4" without a dropped pitman for a couple of days, and other than the steering wheel not being centered (because I did not realign it), I did not feel any bumpsteer or steering problems (now, the vibrations on the back due to the axle and DS not being alignd and the new CV shaft DID shake the jeep up REAL GOOD at about 30mph, so I may have been paying more attention to that than the steering!)

    '94 YJ 2.5L, Sperwinch EPi 9.0, RE 4" Std Lift, Adv. Ad. SYE, Woody Shafts, Alloy Axles, ARB Lockers, 4.88 gears, 62mm TB & Spacer, 165A Alternator, Griffin 3" Aluminum Rad, Taurus e-fan w/ DC Controller, Borla Cat-Back, Flowmaster hiflow cat, PD Ignition, 19# injectors, Adj. FPR (42PSI), MOPAR cam, Safari Snorkel, 33" BFG KM2, 15" AR wheels, Xenon H4 lights, KC Daylighters & Slimlites, Sony sound, Pavement Ends Targa Top, Hanson Front Bumper, JCR Offroad rear, AtoZ Rockers, Rhino lined Tub.

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