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-   -   Death wobble after lift! (http://www.wranglerforum.com/f274/death-wobble-after-lift-251639.html)

shrwud96 06-25-2013 10:52 AM

Death wobble after lift!
 
I recently had a 4" BDS lift installed on my 08 2dr, never had DW before and since it has only happened twice. Just curious on fixes. They installed JKS stabilizer. I previously installed 9/16 bolts on trackbar. Could it possibly be i need a heavier duty stabilizer? Also, the only 2 times the DW happened was over the same set of RR tracks.

n3tfury 06-25-2013 10:59 AM

Not a stabilizer issue. If your ride is dialed in, you can even ride without a stabilizer. Look up Planman's youtube video for death wobble diagnostics.

Part 1

Part 2

kjeeper10 06-25-2013 11:15 AM

What's including with the lift? Higher lifts/geometry can contribute to DW if not done correctly. With that being said .... You need to focus on the track bar and mount holes.

Tweak 06-25-2013 11:22 AM

$10 says you have play in your front trackbar bolt holes or the bolts themselves

shrwud96 06-25-2013 11:25 AM

They installed, trusses, gussetts,adj. Trackbar, jks discos, upper/lower ball joints. Stabilizer. I also watched Planmans videos. Ruled out alot of it with new ball joints. So now im looking for advice. The guys that installed it are kinda thinking stabilizer. Thanks for ur advice guys! Ryan

kjeeper10 06-25-2013 11:29 AM

How can a stabilizer cause DW. It's impossible.
Did they align the jeep correctly ?
Toe ?
Caster ?

Matador 06-25-2013 11:30 AM

Lets start with why you feel its DW? Is the Jeep shaking uncontrollably or is handling very touchy when it goes over bumps? When you experience DW the shaking doesn't stop until you come to a complete stop, is that what your experiencing?

shrwud96 06-25-2013 11:38 AM

Quote:

Originally Posted by Tweak (Post 3897715)
$10 says you have play in your front trackbar bolt holes or the bolts themselves

Even after adding the 9/16" bolts? I retorqued them again and still happened.

shrwud96 06-25-2013 11:40 AM

Quote:

Originally Posted by Matador (Post 3897743)
Lets start with why you feel its DW? Is the Jeep shaking uncontrollably or is handling very touchy when it goes over bumps? When you experience DW the shaking doesn't stop until you come to a complete stop, is that what your experiencing?

Yes, it scared the hell outta my wife and she was the passenger! Haha. I told her she should have felt the steering wheel.

Tweak 06-25-2013 11:40 AM

Quote:

Originally Posted by shrwud96 (Post 3897727)
They installed, trusses, gussetts,adj. Trackbar, jks discos, upper/lower ball joints. Stabilizer. I also watched Planmans videos. Ruled out alot of it with new ball joints. So now im looking for advice. The guys that installed it are kinda thinking stabilizer. Thanks for ur advice guys! Ryan

why not just throw money at it until it fixes itself. if the guys that installed it are stupid enough to think a stabilizer has anything to do with deathwobble then chances are they have no clue what they are doing.


you should get under your jeep and figure out the problem in 10 minutes.

we arent just theorizing here, you have a component that allows movement when it shouldnt. simple as that.

Tweak 06-25-2013 11:43 AM

Quote:

Originally Posted by shrwud96 (Post 3897767)
Even after adding the 9/16" bolts? I retorqued them again and still happened.

yes. 9/16 bolts help, but your bracket is still wallowed out. it solved my problem for a while but it eventually came back. I ended up torquing the crap out of it with an impact, I dont suggest doing that because I dont know what kind of joints you have

watch the videos!

shrwud96 06-25-2013 11:48 AM

Quote:

Originally Posted by Tweak (Post 3897779)

why not just throw money at it until it fixes itself. if the guys that installed it are stupid enough to think a stabilizer has anything to do with deathwobble then chances are they have no clue what they are doing.

you should get under your jeep and figure out the problem in 10 minutes.

we arent just theorizing here, you have a component that allows movement when it shouldnt. simple as that.

All this was done when the lift was done. They put ball joints on at my discretion since they had the front end ripped apart putting trusses on. Didnt cost me that much to have done. So, we arent throwing money at it. Trying to figure it out so I dont. They said that has fixed the problem a few times. Not sure if it matters but on the 4" lift I also have installed 37s

kjeeper10 06-25-2013 12:05 PM

Control arms ?

Assuming a dropped pitman ?

shrwud96 06-25-2013 12:09 PM

Quote:

Originally Posted by kjeeper10 (Post 3897853)
Control arms ?

Assuming a dropped pitman ?

Yes, sorry the control arms for sure. Not positive on the pitman. Dont remember if that was part of the kit or not.

kjeeper10 06-25-2013 12:15 PM

Quote:

Originally Posted by shrwud96 (Post 3897871)

Yes, sorry the control arms for sure. Not positive on the pitman. Dont remember if that was part of the kit or not.

Either a flipped drag link or drop pitman arm would be done to correct steering geometry.
Caster should be around 4.0-4.5
Toe in 1/8"

shrwud96 06-25-2013 12:17 PM

Quote:

Originally Posted by kjeeper10 (Post 3897892)

Either a flipped drag link or drop pitman arm would be done to correct steering geometry.
Caster should be around 4.0-4.5
Toe in 1/8"

I know they did an alingment, i will check with them to see what specs they have. Thanks!

Tweak 06-25-2013 12:32 PM

Quote:

Originally Posted by shrwud96 (Post 3897810)

All this was done when the lift was done. They put ball joints on at my discretion since they had the front end ripped apart putting trusses on. Didnt cost me that much to have done. So, we arent throwing money at it. Trying to figure it out so I dont. They said that has fixed the problem a few times. Not sure if it matters but on the 4" lift I also have installed 37s

I was referring to the stabilizer. It may fix the symptoms temporarily but not the actual problem. Watch your track bar while someone turns the steering.

Saying it is the stabilizer is like saying your headlights don't work because you don't have enough brake fluid.

I don't mean to sound condescending, just seen this situation countless times.

Matador 06-25-2013 02:47 PM

Check the frame side (top) of the track bar bolt. If its oval'ed out then no matter how much you torque down on it, your still going to get DW. The solution is to weld on a thick washers over the holes, then feed the bolt through. This will keep the bolt firmly into place. Make sure that you get the correct sized washer or else you'll have the same problem again.

MTH 06-25-2013 03:44 PM

Did you go over the checklist in Planman's thread?

See here: http://www.wranglerforum.com/f33/dia...ml#post1023390

joeuncool 06-25-2013 05:04 PM

My quite regular DW (every bump did it) didn't go away until I put on the Teraflex monster adjustable trackbar. Then I balanced and rotated my tires and it came back now and then. Took it back to Discount tire and they re-balanced the tires and it went away. Haven't had it for 6 months now.

DW will make the back side pucker won't it? :eek:

kjeeper10 06-25-2013 05:38 PM

1 Attachment(s)
If all else fails maybe this will help :eek:

nvkid 06-25-2013 06:09 PM

Quote:

Originally Posted by shrwud96 (Post 3897630)
I recently had a 4" BDS lift installed on my 08 2dr, never had DW before and since it has only happened twice. Just curious on fixes. They installed JKS stabilizer. I previously installed 9/16 bolts on trackbar. Could it possibly be i need a heavier duty stabilizer? Also, the only 2 times the DW happened was over the same set of RR tracks.

Adjustable LCA`s and caster to +5 has worked 4 me.:thumb:


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