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Unread 04-15-2013, 07:08 AM   #1
Nate620
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Crazy shaking.

Hey guys, I've got a 98 zj 4.0 limited that has some scary wobble/shaking in the font end when hitting bumps at about 50+ mph... I just replaced both front swaybar end links and bushings because they were both shot before and had this wobble and thought the swaybar was the problem. Jeeps stock with no lift at all. Any ideas? Shaking is bad, steering wheel goes crazy back and forth and the whole jeep shakes like crazy... Thanks in advance.

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Unread 04-15-2013, 07:37 AM   #2
KoreaZJ
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Crawl under, have someone whip the wheel back/forth, look for anything sloppy/loose.
Check track bar, control arm bushings, etc.

Search JF for "death wobble".
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Unread 04-15-2013, 08:20 AM   #3
morrist95
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Might want to check your steering stabilizer. i had the same problem on my first ZJ.
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Unread 04-15-2013, 11:13 AM   #4
PolkaPower
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Steering stabilizer would not cause that. You have worn out or out of spec suspension components. The Steering stabilizer isn't necessary it just makes things smoother and can cover up the real problems until they get really bad.
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Unread 04-15-2013, 11:26 AM   #5
Nate620
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My front shocks/springs are in some rough shape was planning on replacing those but didnt think they'd cause something like that, could this be causing it?
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Unread 04-15-2013, 11:50 AM   #6
PolkaPower
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Probably the control arm bushings.
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Unread 04-15-2013, 12:09 PM   #7
Nate620
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Upper or lower? I'm looking threw JF but can't find much about death wobble for ZJs just trying to find out all the possibilities, I only get the wobble when hitting a serious bump besides that the jeep drives fine on highways/ fast speeds. I also could use a alignment, it's off a little but nothing serious.
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Unread 04-15-2013, 12:18 PM   #8
riot1987
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DW is usually not one specific part. Its a combination of worn parts. Check ALL control arm bushings up front, Check ball joints.
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Unread 04-15-2013, 12:20 PM   #9
riot1987
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Steering stabilizers as mentioned, can help but are rarely the cause of the issue. KOR has some higher durometer bushings but I would investigate your jeep further before going and buying those. DW is a tricky beast good luck
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Unread 04-15-2013, 12:31 PM   #10
Nate620
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Quote:
Originally Posted by riot1987
Steering stabilizers as mentioned, can help but are rarely the cause of the issue. KOR has some higher durometer bushings but I would investigate your jeep further before going and buying those. DW is a tricky beast good luck
Yeah I've heard a lot about death wobble and I'm not looking forward to this... Really don't even know where to start, but thanks, when I get out of work I'm going to get under there and start seeing if I can notice anything.
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Unread 04-15-2013, 01:11 PM   #11
dnuccio
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id just replace all wear items in the front end, regardless if theyre bad or not. from what ive read on here, steering stabilizers are never the cause of DW. ive read that if your front end is set up perfect, you dont even need a stabilizer
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Unread 04-15-2013, 02:13 PM   #12
Oldfrog
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There are many culprits, as has already been mentioned.
One common one might be the upper track bar mount on the driver's side. It gets loose. To check it, get a trusted friend to start the Jeep ( parking brake on, in park and his foot on the brake) while you lay under the front end with a flashlight and look for unusual movement as he turns the wheels side to side. Pay particular attention to the track bar ends. Track bars do wear out....and the upper mounts loosen over time.

But as already stated, check tie rod ends, ball joints, control arm bushings...and I'll add another one. The steering box. Make certain it's not moving either.

The steering damper is NOT your problem...trust me. While it may be worn out and need replacing, it's not the underlying cause of death wobble.
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Unread 04-15-2013, 02:35 PM   #13
Nate620
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How do I check the steering box to see if its not moving?
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Unread 04-15-2013, 02:36 PM   #14
riot1987
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Same way. Have a friend turn while you are peeking at the box to look for movement. Itll be obvious if its loose
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Unread 04-15-2013, 02:38 PM   #15
riot1987
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Ive had my pitman arm loose from the steering box a couple times. It didnt cause DW but check that too. The ****ed thing about this is that its hard to say where to start. You just have to check EVERYTHING under there and look for looseness
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