Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: newfie glass on June 26, 2011, 09:35:18 PM

Title: newly lifted zj: death wobble
Post by: newfie glass on June 26, 2011, 09:35:18 PM
finally got my zj lifted with v8 springs and spacers. swapped the fronts to the rear and now have death wobble. i understand that this is not the ideal lift but when on a budget i thought it would be alright. im getting an alignment done this week sometime but im worried about the wife having to drive it. front end looks tight, but i did notice a tear in the bushing on the frame side of the trac bar. Any ideas how i could remedy this or should i just tear it out and buy a proper lift? :-[
Title: Re: newly lifted zj: death wobble
Post by: WhiteOut on June 26, 2011, 09:56:33 PM
That trackbar bushing is the problem, I assume its the stock trackbar and you just drilled the hole over?
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on June 26, 2011, 10:05:38 PM
i didnt drill anything. i installed a relocation bracket but it pushed the diff out too far so i too it off. the diff looks to be centered under the body. i will order the trac bar bushings tomorrow. is there any stock sway bar end links that are larger then the zj's? was told to get bigger ones to help with steering.
Title: Re: newly lifted zj: death wobble
Post by: jpthing on June 28, 2011, 09:23:48 AM
Start out by eliminating all sources of play or looseness.
I wouldn`t bother paying for a pro alignment until you are sure you are happy with your setup.
Just do a home alignment until you get your problems worked out.
Did you adjust the alignment at all after you lifted?
Title: Re: newly lifted zj: death wobble
Post by: JackstandJohnny on June 28, 2011, 09:44:49 AM
get underneith and look for play.  have a buddy/wife etc. wiggle the steering wheel back and forth quickly.  watch your track bar and ball joints etc for play.  this will help you find your issue.

likely its your track bar.  things like bad balljoints, hubs etc. will contribute to DW.  figure out where the play is then go from there.

i did that exact lift on a previous ZJ and had absolutely no DW whatsoever.
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on June 28, 2011, 11:30:41 AM
I replaced the tie rod end that attaches to the pitman arm. No change. I have a new steering stabilizer which probably would not hurt anyhow. I think I will buy an adjustable trackbar and hope that fixes the issue. I would like adjustable so I can use it in the future when I get a bigger lift.
Title: Re: newly lifted zj: death wobble
Post by: BlackYJ on June 28, 2011, 12:02:24 PM
I have a new steering stabilizer which probably would not hurt anyhow.

A steering stabilizer will only mask the issue and not resolve them. 
Title: Re: newly lifted zj: death wobble
Post by: specialk on June 28, 2011, 12:15:50 PM
A steering stabilizer will only mask the issue and not resolve them. 

if we have learnt anything from Bill...
Title: Re: newly lifted zj: death wobble
Post by: jpthing on June 28, 2011, 12:49:03 PM
I replaced the tie rod end that attaches to the pitman arm. No change. I have a new steering stabilizer which probably would not hurt anyhow. I think I will buy an adjustable trackbar and hope that fixes the issue. I would like adjustable so I can use it in the future when I get a bigger lift.

Changing something that is ok will not help. Find the play. Usually is associated with track bar and wheel bearings, after that check steering, then ball joints. Do what Johnny said, have one person saw the wheel hard back and forth (engine off, wheels blocked) while you crawl under and looksee.

good luck.
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on June 28, 2011, 05:12:21 PM
Found the problem!!  After do as instructed by just about everyone here, lol, we noticed about 1/4" of play in the steering box. I can get a new one for $250 but I wonder if there is an aftermarket upgrade that would be in my budget? Anyone know of an alternative to a stock steering box. And many thanks to you guys for helping me out.
Title: Re: newly lifted zj: death wobble
Post by: w squared on June 28, 2011, 05:28:26 PM
I think the "jeeper" advice is drive 'til it spits out a part number, and then upgrade it.

Now you have the part number...and the upgrade is hydro assist ;D
Title: Re: newly lifted zj: death wobble
Post by: WhiteOut on June 28, 2011, 05:32:10 PM
Durango box should be a direct swap. KOR and IRO both make a brace for the steering box.
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on June 28, 2011, 06:14:39 PM
Any idea what year and engine size Durango steering box would fit? And where could I find a steering box brace? I looked on iro's website and rc's and could not find one
Title: Re: newly lifted zj: death wobble
Post by: jpthing on June 28, 2011, 08:49:32 PM
I think it's a 98 0r 99 with the v8, there is a regular and a snowplow version, both have good reviews, I think the regular has a constant ratio and the snowplow has a variable ratio...both are a little quicker and limit overall steering slightly. you can also use a dakota box.
Title: Re: newly lifted zj: death wobble
Post by: cLAY on June 29, 2011, 08:53:13 PM
What size tires are you running? I wouldn't run any box that limits your turning radius.

I would run a good quality stock box with a brace for 33" and under. If you need more try a high performance pump and if you still need more look at hydro assist.

PSC is a company out of the US that makes custom boxs for Jeeps. I've heard good and bad stuff about them.
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on June 29, 2011, 09:20:22 PM
im only running 31"s. im gonna try the durango box as its cheaper then the stock zj one and from what i have read its a good difference over stock
Title: Re: newly lifted zj: death wobble
Post by: cLAY on June 29, 2011, 10:57:31 PM
I'll be interested in hearing how you like it. I had  passed it by as I didn't want to lose any turning radius, the thing is enough of a tank as it is. However I'm wondering just how much you actually lose.
Title: Re: newly lifted zj: death wobble
Post by: Bnine on June 30, 2011, 07:26:25 AM
You can gain the radius back in two ways. You can have the box torn down and have the radius increased. It essentially has stops internally that limit the range.

Or, you can use a WJ pitman arm, which about 1-1.5" longer then a standard tj,zj, xj, etc etc.

A WJ pitman is about 45$ at the dealer last time I checked a couple of years back.

Lastly, I would be carefull in assuming that your box is the cause of the death wobble. It is more likely that your box is trashed as a result of the death wobble. I would hate to see you put in that box only to tear it up because you still have death wobble.

The best thing you could do is have someone good with death wobble look at it, and give you some recommendations.
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on July 02, 2011, 08:57:18 AM
so after looking at the core charge for the durango steering box it was more then the box so i opted for the stock one for now. Apeman is making me a brace for it as well. i replaced the steering stabilizer as well and it seems to have cured the DW. took it for a long drive and i gotta say, what a difference. both steering and stability on the road.
Title: Re: newly lifted zj: death wobble
Post by: BrokenAxle on July 02, 2011, 09:04:54 AM
i replaced the steering stabilizer as well and it seems to have cured the DW.

Remember, not cured, just masked.  The problem is still there and it will eventually come back!
Title: Re: newly lifted zj: death wobble
Post by: newfie glass on July 02, 2011, 09:42:56 AM
i probably should have worded it better.  :-[
after replacing both the steering box and the stabilizer its cured.
Title: Re: newly lifted zj: death wobble
Post by: JJonesee on July 04, 2011, 11:01:34 PM
What is your Caster angle?