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  #1  
Old 10-10-2015, 01:44 PM
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Death wobble

I changed most of the front control arm bushings a while ago, several bushings where completely shot (also track bar bushings are new now). Now that all the bushings are tight again, i was quite unpleasantly surprised with the infamous dead wobble. Sofar it happened once while driving on the highway and hitting some rough spots and once while going of the highway, but also hitting some rough spots on the road. The first time it was short and stopped, once i lowered the speed a bit. The second time i was already lowering speed, because i was going of the highway, and it lasted quite a bit. No good feeling and most probably can lead to loss of control. Just jacked the front up today and the only place where i can see/feel play, is on the steering gear box. I will try the adjustent of the steering gearbox. If that doesnīt help, did someone already overhaul the gearbox? New bearings and seals for example? Or is the problem wear at the gear itself?
I know refurbished gearboxes are offered, but with the high dollar at the moment (compared to the Real), the shipping cost and taxes, i would prefer to repair the gearbox myself.

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  #2  
Old 10-11-2015, 07:59 AM
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Re: Death wobble

I had a similar problem some time ago. What cured it for me was to replace the steering stabilizer. This was four years ago. I installed a Moog Trail Boss. It is still going strong. If have not changed yours it might be worth a try.
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  #3  
Old 10-11-2015, 05:34 PM
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Re: Death wobble

Thanks for the reply. I changed my steering stabilizer at 117K km and again at 207K km. I have now around 30K km on the KYB steering stabilizer, so it shouldnīt be worn yet. Adjusted the steering gearbox yesterday and quite a bit of the play has gone now, however not all. I will see if the wobble returns or not.
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Old 10-12-2015, 08:33 PM
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Re: Death wobble

These are probably the two best videos on the whole death wobble issue:





If I'm not mistaken, torque ratings for everything is in the Factory Service Manual as well and I think... also in Planman's post on another forum. I'll try to look it up for you. Get a buddy and you should get this problem solved by watching Part 2 in less than 30-60 minutes.

I have the wobble now and the tie rod end going into the pitman arm is loose. I haven't checked everything yet just felt that by pushing it up and down. Kind of neat how he tested the ball joints and you could see daylight through the gap.

Here is Planman's write up: http://www.jk-forum.com/forums/jk-wr...obbles-260145/

All the torque settings are under 'Suspension' Front and also the 'Steering' sections in the factory service manual. I would retorque everything if you want to be sure it is one less thing wrong. Mine has 136k miles on it and who knows if the steering hasn't been tightened after it left the factory.

I was thinking it could be the steering box myself but there's no play in the steering wheel for me. I'm sure there's a way to check it or diagnose it however. Plenty of $200-$300 steering boxes on ebay though. Not usre if new/reman.

Good luck!
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Old 10-12-2015, 09:07 PM
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Re: Death wobble

Not meaning to double post but this is pretty much my problem:

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Old 10-15-2015, 06:52 AM
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Re: Death wobble

Thanks 2000JGClaredo, i will check all points again. Eventhough i couldnīt find any play in the bushings, rod ends and ball joints when i checked it before, i will look into it again. Strangely enough the dead wobble was not there before changing the bad bushings. But there must be something worn or at least with play.
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Old 10-15-2015, 03:07 PM
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Re: Death wobble

I had DW on my XJ. Everything seemed fine. I did have a faint clunk when I was turning and backing up, but when I did the typical check on my balljoints I could not find any wear. I had the front apart to do inner axle seals and decided to throw ball joints in anyway since it was all apart. After I got the knuckles off, the uppers were nice and tight, but the lowers were sloppy and loose. Changed the BJs and got it all back together and no more DW and no more clunk.
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  #8  
Old 10-17-2015, 12:00 PM
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Re: Death wobble

Ok, so this morning i found some time to look into this. Put my wife behind the steering wheel and myself under the jeep ( yeh, yeh, i know, this would be the perfect opportunity for her to get rid of me and claiming it was an accident)
So two things came up: the new bushings in the track bar seem to be from a too soft of rubber. There is quite some movement of the chassis compared to the axle. This ofcourse could already cause the DW. I also found some up/down movement on the outer rod end on the drag link. I will get a torque wrench and torque all the rod ends to specs and than check again.
Regarding the trackbar, is someone using the KOR PU bushings in there, or has good experience with an other brand/type?
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Old 10-17-2015, 12:04 PM
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Re: Death wobble

Typically when the tie rod end part of the track bar has up/down movement, that joint is shot and the bar needs replaced. I have had great success with replacement urethane bushings from Prothane - they are extremely hard bushings, feeling more like a hard plastic than urethane.

Here is a link for the XJ version of the bushing -
http://www.summitracing.com/parts/pt...model/cherokee
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  #10  
Old 10-18-2015, 08:22 AM
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Re: Death wobble

Changed the drag link rod end today and torqued the track bar bolts. Will see later today if i feel any change.
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