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Old 10-10-2013, 09:02 PM   #1
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2.5 Rc lift now death wobble

I was wondering if I could get your opinion on a death wobble issue I have. I drive a 2.5l jeep I recently installed a 2.5 RC (gave me almost 4inch lift )with a tcase case. I re used stock shackles and I didn't re install sway bar or track bars since a lot of people say Yj's really don't need them. I' have a 6 month old steering stabilizer and right after installing the lift kit my self I took it for alignment.

Anyways the jeep was driving fine on highway at 65 mph and regular streets until Today when coming down the highway on 5th gear I got the famous death wobble!

I got the same wobble later on when doing 40mph on regular street on 5th gear!

What can be causing this??

Someone said to check on faster angle and possibly correct them with front shims.

You would think people front the shop would said something if the caster angle was bad

What else can be causing this?
I have decent condition front end components and new u joints

Please help!

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Old 10-10-2013, 10:15 PM   #2
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I wouldnt think caster angle, if the new springs dont have any shims, the caster angle shouldn't have changed.

This usually has to do with steering geometry after the lift. Someone who knows more about the subject than I could probably answer that.

Sorry for the relatively useless answer.

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Old 10-10-2013, 10:26 PM   #3
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Check and retighten all of your U bolts on the spring perches
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Old 10-10-2013, 10:27 PM   #4
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When you lift you change the steering geometry and then there are some issues as death wobble, some slop in the steering etc. These become very apparent after the lift. But the famous DW is a little complicated. You have to check a lot of things and it could be a combination of all that makes it happen.

You need to do or check all of the following and others will chime in shortly
Tires balanced and even rotate them
Loose tie rod ends
Loose or worn ball joints
Loose unit hub bearings
Loose steering gear box on the frame or worn internally
Loose wheels were they torqued properly after install
Worn steering column bearings
Worn steering intermediate shaft u-joints

So you can see there is a lot there. Please don't stop at the first thing you find and say that's it I am done because you may have several symptoms that all contribute to the wobble.

There a ton of threads on DW so do some reading to find out what others have done.

I never had it with my YJ just my old stump jumping F-250 so I know what it feels like and that was always alignment and wheel balance.

Put you sway bar back on and get discos for the trail. The sway bar will help with control in a tight spot on the highway believe me.

You steering dampner is only one part check that also. Be picky on your parts but check everything.
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Old 10-10-2013, 10:53 PM   #5
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My lift kit had shims in the back to help drive shaft angle. No shims correct caster angle.. Tomorrow I'm going to stop by the tire shop where I to my aligment done and have them check my alignment again and balance my tires I don't see any wight on the front wheels.
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Old 10-11-2013, 05:48 PM   #6
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Yeah that could be an issue. You in Miami FL??? Lived in Hollywood for years. I imagine it is a little distance to wheeling out west.
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Old 10-12-2013, 08:11 AM   #7
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Check for play in the steering components up front, after a lift kit is put in sometimes something wasn't put back the way it was supposed to be.

Also the steering stabilizer might be gone, there's so many potential reasons for DW. It's rare with the YJ though, I would bet something was reassembled incorrectly.
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Old 10-13-2013, 10:33 AM   #8
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I have the same setup you do, but left the sway bar. Since the YJ has leaf springs, I didn't bother with an alignment after the lift and my tires are wearing properly, (although I do rotate regularly). I've never had a problem with DW.

I think I would concentrate on two things.
First, I would make sure that everything is tight on the front-end, to include a re-torque of installed components, e.g. leaf spring mounts, u-bolts, etc. Second, I'd re-check the alignment. Did you get a thrust angle alignment or just a front-end alignment? I've always paid a bit more and ensured that all 4 wheels are aligned.
You never know, sometimes shops make mistakes and it should be easy enough for them to check.
Good luck!
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Old 10-14-2013, 08:03 PM   #9
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Ok, so i got my jeep back from my mechanic he checked for all front end components and lack of torque on any suspension components and told me that he couldn't find anything wrong. However he says that sway bar and track bars should be installed.

I know a lot of people don't use them! and my only opinion about it is that it does feel like a smother ride without them. However I never go wheeling and my jeep is used mostly on highway.

Now with that being said and not trying to make this discussion about using or not the track bars and sway bar I have other questions.

1) Do i need relocation brackets for the track bars? it seems like the front want would fit but very tightly. If so does that affect the performance of the track bar? what bracket brand should i get? Doesn't seem to be too far from fitting..Do i need to connect the rear track bar too?

2) when I was taking off the sway bar I was convinced I wouldn't need it so I cut it in half. Can I buy a stock bar and use the old links?

3)Should i get a pitman arm drop? or maybe just tighten the steering a little bit?

I want this jeep to be very safe reliable on the highway and move on to other projects!
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Old 10-14-2013, 08:19 PM   #10
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Your lift should have came with longer sway bar links and a bracket to relocate the sway bar and another pitman arm if it was needed.
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Old 10-14-2013, 08:46 PM   #11
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I know that.. I called the company and they never send me the additional parts or compensation considering the lift gave me 4 inches instead of 2.5 inches. Should I call rough country and deal with them directly?
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Old 10-14-2013, 08:50 PM   #12
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Quote:
Originally Posted by Signalman View Post
Your lift should have came with longer sway bar links and a bracket to relocate the sway bar and another pitman arm if it was needed.
That statement is packed assumptions that arent always correct.

My first lift was a 2.5" and it came with springs, bushings, and sleeves. Nothing else. I needed to drop the tcase on my own, and the track bars did not fit.

In order to connect those track bars you'll need relocation brackets. The sway bar, you mgiht be able to get away with the stock links for that small of a lift, but you can get longer links for a 2.5" lift. If youre buying them anyway, get the longer links. If you need a whole new sway bar, you could go aftermarket, or get a stock one from a junk yard.

a 2.5" lift probably doesnt need a new pitman arm, however, you should try to keep the drag link, and the track bar at the same angle, Or so i'm told. So if you're relocating the track bar, you should probably get a pitman arm that drops as much as you relocated the track bar.
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Old 10-15-2013, 08:46 PM   #13
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I connected the front track bar and the wobble is gone! However I feel the right front tire vibrate more than normal.

I'm gonna connect the rear track bar on Saturday and next week connect my new sway bar!

Do you think I need tire balancing? how often tires get out of balance the front tires are the way they were when I bought this jeep..

I want to hear your opinion before I spend more unnecessary money!
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Old 10-15-2013, 10:29 PM   #14
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Get the tires balanced and check everything else. It all contributes and that DW is scary. Had it in a F-150 thought it was over.
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Old 10-16-2013, 02:06 PM   #15
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I, surprisingly, have never had a DW issue. Guess ive just been lucky.
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Old 10-16-2013, 07:47 PM   #16
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The reinstalled track bar didn't fix the problem, it only masked it. If you're feeling a vibration in the front passenger tire, it could be the unit bearing going, tie rods, or unbalanced tire. I guarantee you it wasn't the track bar.

Most mechanics don't understand the reasons we remove things such as track bars. They just look in a book and see that it "should" be there so that's the problem. They like everything to be stock. It should be no problem for a competent mechanic (or even an informed DIY'er) to diagnose worn suspension and steering components.
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Old 10-17-2013, 04:13 PM   #17
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You are right!! something else is most be going on because I feel the beginning of the wobble is there and now the track bar is just preventing it from happening !

I already check fro bad tie rod, ball joints and front end components.

Today I felt the vibration from the transmission i replaced the transmission mount 5 months ago. Do you think it could be vibration coming from the drive shafts angle? how tight the two bolts underneath the the skid plate should be?

I'm gonna get new rims for the front and have the tires balance balance and hopefully that would help!
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Old 10-17-2013, 06:18 PM   #18
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Quote:
Originally Posted by yjmiami View Post
However I never go wheeling and my jeep is used mostly on highway.

....

I want this jeep to be very safe reliable on the highway and move on to other projects!
This is the #1 reason it is incredibly foolish and ignorantly dangerous to blindly say "take em off and don't look back".

Every vehicle operated onroad should have a swaybar. If you do not go offroad, there is only negative benefit, and certainly no positive benefit (I guess you could argue percieved comfort), to removing track bars.
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Old 10-17-2013, 07:31 PM   #19
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I would hook the sway bar back up. Now if this lift gave you 4" of lift.. then I would consider a drop pitman arm to correct the steering. did you tighten the leaf spring bolts in the air or on the ground? You might want to check the spring hanger bolt fron and rear, as people tend to over tighten those and it can make it ride harsh as well. Also try a tire rotation.

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