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Discussion Starter #1
Ok I changed my steering stabilizer from stock to a mild upgrade to Daystar KUO1019. And now for the first time I am experiencing the death wobble on freeway. Before this I put on a 2” coil spacer and had it aligned and had no problem, prior to the stabilizer upgrade. Any Ideas?
 

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Tell me about your tires, that's the first place the wobble starts. They could need a re-balance, or if they are close to their time for replacement. And by death wobble, is it a shimmy and shake, or an "oh my god, I'm donna die unless I stop right now" kinda wobble?
 

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The first thing to ask is was the wobble so violent and complete that you had to bring the Jeep to a stop or near stop? Or did it just shake pretty bad and go away?
Was anything wrong with the stock steering stabilizer?
Unless it is broke there isn't much reason to replace the stocker.
A steering stabilizer shouldn't cause Death Wobble. Nor can it fix Death Wobble.
Adding a lift, or any work where you are loosening and tightening bolts in the front end can cause Death Wobble. Certain bolts in the front end need to be tightened fully and properly or Death Wobble can result. DW is usually a result of play or any looseness in the front end, especially in the track bar.
A steering stabilizer should not cause DW, but a steering stabilizer can cause steering issues if it is bad.
A steering stabilizer will not fix DW, either. If you have DW you need to find the play in the front end that is causing it.
If you search the forum you will find plenty of info on what to do to stop DW.
Here is a link to get you started.
https://www.wranglerforum.com/f202/diagnosing-death-wobble-and-fixing-non-dw-shimmies-and-wobbles-78034.html
 

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Discussion Starter #4
Had to dam near stop, just had tires balanced. Did it before and after. Changed stabilizer just because. Can a slight bent tie rod cause this? Slipped off jack once before alignment.
 

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I would doubt a bent tie rod would cause it. It is usually from some sort of play in the front end. Play in the tie rod ends, or play in anything else having to do with the front end. A common source of play is the track bar ends. Another source is ball joints. Anything that allows movement in the front end can cause it.
You may want to search for the planman video on death wobble. There is plenty of info already out there.
 

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I disagree that a bent tie rod would not contribute. When it bent it changed the tow in. Also, your 2" lift perhaps changed the castor. Both can contribute to death wobble
 

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Did you get a report with the specifications after the alignment? From your post, it would appear that you had the alignment done AFTER you installed the lift.

Yes, the lift will change the caster. If it is out of spec, when you had the alignment done if after the lift the specs should show you how much out of spec they are.

Here is a link to the Planman post referenced.
http://www.wranglerforum.com/f202/diagnosing-death-wobble-and-fixing-non-dw-shimmies-and-wobbles-78034.html


And here is a post reference the impact of caster on a Ford F250 with DW. No, it is not unique to Jeeps.

 

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I'd replace the tierod and ends. Between the impact of possibly bending the rod and who knows how much force the garage used during the front end alignment, those tierod ends may be shot.

I agree with the first guy, check the wheel balance first. Might as well upgrade the tierod while your replacing it. Then last, those ball joints, if there was a wobble once they were already stressed.
 

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Discussion Starter #13
Found a good post and a lot of people are replacing the bolts on the track bar with 9/16 shoulder bolts because the stock in’s are a hair small and are all threaded.
 

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Discussion Starter #14
How long should the shoulder part be. They say use M14 bolt or 91/6 18unf x 3.0 bolts. Will that determine the shoulder part?
 

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Discussion Starter #15
Well I went ahead and ordered a kit to replace the LCA bolts front and rear withe track bar bolts to beef the front end up. I did notice the drag link to pitman arm has movement in the whole Up an down but doesn’t seem to have sided to side movements. I’d this bad? By the way this is the kit I ordered. Jeep Wrangler JK Track Bar and Lower Control Arm Bolt Upgrade Kit + Extra M14 Bolt https://www.amazon.com/dp/B018Q6FK0Y/ref=cm_sw_r_cp_api_i_CpBYDbBCC0FB6.
 

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Did you figure out what was causing your wobble?
Unless one of the holes in the track bar mount are ovaled out or there is some other looseness in the front end, I am not sure about replacing the bolts actually fixing your wobble.
When you had it aligned, what did they say was your caster? And your Toe?
 

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I would say check your balljoints, if you had a deathwobble and the BJs are stock chances are they might be shot now. Does you car pull in any specific direction? I know sometimes a bad steering stabilizer will want to push or pull in a certain direction and that could be a culprit. Apart from that definitely check your TB see if the bolts are tight (u really wanna have these tight), you can even have someone shake the steering wheel of your car back and forth while its off to see if there is any unusual movement in your front suspension.
 

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I got my '08 2nd hand with a 2" lift. I found that certain bumps would trigger massive shimmies that at least once almost ran me off the road. The problem was the caster being too low after the lift. Adjustable LCAs, (later replaced with geo brackets), fixed it.


Steering shimmy from low caster can be almost as bad as DW, and can cause damage/wear to other components that can evolve into DW. When does your DW occur? Can you trigger it at certain known places? If so, what are the conditions in that place? Or does it occur on straight, or slightly curving, smooth road at speed? Do you have to come to an almost complete stop, or only slow down to, say, 30-40mph?


As said above, a steering damper won't cause DW, & cannot fix it. It can only, sometimes, act as a bandaid to cover up the cause until the real problem gets so bad it cannot be concealed any more.
 

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OK, caster is way too low. Hit an angled bump anywhere around 50mph & you will likely get vicious steering shimmy from that alone.


Feel around for anything loose, (get someone to wiggle the steering wheel left/right with the engine off & wrap your hand around the rod ends to see if you can feel movement, there shouldn't be any.)



Other than that, adjustable LCAs if you want the best ground clearance, or geo brackets if you want better on road ride, or ground clearance is not the most important thing.



I'd give even odds that if you fit one of those, your problem will go away, (at least until something wears and you get real DW). Mine hasn't come back in ~70,000km since fitting them.
 
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