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Help diagnose death wobble!!

Discussion in 'Suspension' started by benbacher, Apr 13, 2013.

  1. Cowboybob

    Cowboybob Well-Known Member

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    I fought the exact same issue with my Jeep JK Unlimited. Scary as hell and no fun while at highway speeds! Replaced all of the front end suspension and steering components one by one until I had it cured. The biggest problem is, once your vehicle has had the DW a few times it accelerates the front end component wear/tear.

    After literally days of research and troubleshooting, the following was the cure I found;

    First things first, tell your buddy to replace the upper and lower ball joints. I ended up installing rebuildable heavy-duty ones that were expensive but well worth the $. At the same time, and most importantly, check the upper and lower bolt holes on the mounting bracket for the track bar. I would be willing to bet that the bolts holes are slightly ovaled (is that a word?) from the DW. Either that or there may be enough play between the bracket/bolt/track arm bushing(s) to exaberate the DW. The bracket/bolt/track arm bushing(s) assembly must have a very tight tolerance and the bolts must keep properly torqued. Loose or improperly torqued track bar mounting bolts are typically what starts DW in the first place. He may need to weld some grade 8 washers or machined gussets to the track arm mounts if there is any play or elongation of the bolt holes.

    Remember, both of these fixes must be completed at the same time. If he just does one or the other, he will likely still have DW and will start the wear/tear issue all over again. DW is a vicious cycle, but it can be fixed.

    Good luck!
     
  2. Redneck92

    Redneck92 Well-Known Member

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    There are no upper and lower ball joints on this axle. However worn trunnion bearing could attribute to DW.
     
  3. Cowboybob

    Cowboybob Well-Known Member

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    Dooh....guess I should have watched the video before posting. I was just going by my previous experience and didn't realize he had a Birfield axle set-up vs ball joints. As redneck pointed out, check the bearings, but definitely check the track arm mounting as well as all the other bushings that locate the axle.
     
    Last edited: Apr 15, 2013
  4. mt sas

    mt sas Well-Known Member

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    western montana
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    S.A.S 21spline tcase highsteer
    I just fixed the same problem on my leaf sprung truck it wasn't a steering issue at all . I replaced all my spring to frame bushings after checking everything else a hundred times and it is gone. hope you guys figure it out it !
     
  5. benbacher

    benbacher [OP] Purveyor of Fun Vendor

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    Too many to list now.
    Bump, any more advice?
     
  6. mt sas

    mt sas Well-Known Member

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    hmm ? if all the steering parts are tight I would check out link connections any movement front to back in them can cause wobble . the slop in my spring bushings was causing my wobble . it seems like it should be steering component issues but would check out axel to frame connections . good luck !
     
  7. 4WD

    4WD cRaZy oLdmAn

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    Is this "death wobble" the same as having a bad shimmy on a solid axle front end ? (excuse my ignorance with that term :anonymous::eek:)
     
  8. benbacher

    benbacher [OP] Purveyor of Fun Vendor

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    Yeah, check the video if you can doug, hahaha its a bit more than what I would describe as a 'shimmy'
     
  9. 4WD

    4WD cRaZy oLdmAn

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    Grey wire MOD, deck plate, diff breather MOD, 2nd gen. OME 883# on Tundra 5100's, OMD custom 3" leafsprings, rear shock relocation, Ivan Stewart TRD rims w/285/75/16's, '02 bumper MOD, Famous Fabrications sliders , LED interior/exterior lights, bed bar, Custom tube bumper, Old school KC day lighters,Red Ring 8" HID flood, Kenwood vhf 2M.. umm some other shit I'm forgetting right now

    Holy Balls !!! Yeah thats pretty bad def. something going on with the pass. side of steering/suspension Almost like a badly balanced (or no) tire/wheel but whats allowing it to do that is the problem maybe bent flange/spindle/ looks like a drag link type of steering (no pitman, is this correct ?) Drivers side looks like its behaving normally... wow...:notsure:
     
  10. 4WD

    4WD cRaZy oLdmAn

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    Gardnerville, Nevada
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    Grey wire MOD, deck plate, diff breather MOD, 2nd gen. OME 883# on Tundra 5100's, OMD custom 3" leafsprings, rear shock relocation, Ivan Stewart TRD rims w/285/75/16's, '02 bumper MOD, Famous Fabrications sliders , LED interior/exterior lights, bed bar, Custom tube bumper, Old school KC day lighters,Red Ring 8" HID flood, Kenwood vhf 2M.. umm some other shit I'm forgetting right now
    That is if you've ruled out tie rod ends,etc:
     
  11. benbacher

    benbacher [OP] Purveyor of Fun Vendor

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    Too many to list now.
    Tire was out of round all along. We put on some new 39 1/2" IROKS monday and it drives like a dream.
     
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