Diagnosing Death Wobble and Non-DW Wobbles and Shimmies Videos - JeepForum.com
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post #1 of 17 Old 06-02-2012, 01:21 AM Thread Starter
planman
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Diagnosing Death Wobble and Non-DW Wobbles and Shimmies Videos

Several people have requested videos that explain Death Wobble and diagnosis/inspection.

The videos are kind of long at 18-19 minutes each. Hopefully, they are thorough enough to help.




Here is the link to my Death Wobble Diagnosis thread with written explanations:

https://www.jeepforum.com/forum/f96/d...bbles-1052221/



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post #2 of 17 Old 06-03-2012, 05:23 PM Thread Starter
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If you have questions, you can post either here or in the longer Death Wobble diagnosis thread.


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post #3 of 17 Old 06-11-2012, 03:05 PM
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I took delivery of a 2012 Rubicon and wondered if death wobble remained a concern with that jeep. The bolt part number is M14X1.50X70.00. Does the 14 refer to the same 14 mm bolt that caused the problem? If so where does one buy Grade 8, shouldered 9/16 bolts as recommended previously?
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post #4 of 17 Old 06-11-2012, 03:12 PM
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Great stuff, Planman, thanks from all of us in the Jeep community!
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post #5 of 17 Old 06-11-2012, 03:14 PM
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Quote:
Originally Posted by JamzAre
I took delivery of a 2012 Rubicon and wondered if death wobble remained a concern with that jeep. The bolt part number is M14X1.50X70.00. Does the 14 refer to the same 14 mm bolt that caused the problem? If so where does one buy Grade 8, shouldered 9/16” bolts as recommended previously?
Thanks to all.
I could be wrong but I believe this is a non issue on the newest models. Anyone exp this in a post 2010 JK?
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post #6 of 17 Old 06-11-2012, 08:17 PM
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This will always be an issue with solid front axles in this configuration. While proper torque of the trackbar is essencial, the smaller 14mm bolt exacerbates the problem. Torques on the trackbar (and other areas illustrated by Planman's video) should be checked frequently. As a note, I just replaced all of my 14mm bolts with shouldered 9/16" Grade-8 bolts three weeks ago and I found my trackbar mounts (axle side) slightly wallowed out, making the 9/16" bolts loose as the 14mm were in the first place. I'm planning on beefing up the mount in a couple of weeks when I start my re-gear process.
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post #7 of 17 Old 06-11-2012, 10:47 PM
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Thanks

Planman, your death wobble diagnostic is extremely informative, thank you so much for looking out for all of our Jeeps! I have had a really weird vibration at slow speeds, it's not death wobble but I'll go through your checklist anyway, I'll likely come across the culprit!
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post #8 of 17 Old 06-12-2012, 07:49 AM
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Great video planman!

The DW thread is also.
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post #9 of 17 Old 06-12-2012, 08:21 AM
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Is Death Wobble a very common thing that happens? I'm planning on getting a JKU pretty soon, and I know if it happened to me without seeing a DW video, I'd freak out. Is this something that occurs more often if you really use your jeep for off roading, or is it a random thing? (I watched some of the videos, but not everything.)
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post #10 of 17 Old 06-12-2012, 08:31 AM
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Quote:
Originally Posted by drpericak
Is Death Wobble a very common thing that happens? I'm planning on getting a JKU pretty soon, and I know if it happened to me without seeing a DW video, I'd freak out. Is this something that occurs more often if you really use your jeep for off roading, or is it a random thing? (I watched some of the videos, but not everything.)
Death Wobble can happen to any solid axle vehicle with a link suspension. In unmodified Jeeps, it is pretty rare. If you modify your suspension with longer, adjustable links, it can happen more frequently....however, when it does, it's usually due to a combination improper installation and insufficient maintenance.

During installation all components should be torqued to proper specification, and after a hard wheeling trip, the operator should inspect and re-torque suspension components. In theory, a properly maintained suspension shouldn't have a Death Wobble episode.

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post #11 of 17 Old 06-12-2012, 08:40 AM Thread Starter
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DW happens due to worn/damaged parts, improper installations, and poor maintenance.

It doesn't matter if a jeep is lifted or not. Poor maintenance can result in DW. I have helped diagnose DW sources on many stock JKs, and I have read reports of new JKs with loose trackbar bolts.

Stock or modded, the control arm and trackbar bolts should periodically be retorqued to specs.


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post #12 of 17 Old 07-04-2012, 10:11 PM
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While "most" dw's are cured by resolving trac-bar issues...it should be noted that the other "worn/damaged" parts others spoke of can easily cause the same issue. Just replaced ball joints, never touching my trac-bar, and my death wobble went away instantly. It should be noted, I had a slightly bent "C" and needed an offset joint to put the camber and caster back in spec. Once installed, again, never touching my trac-bar....my death wobble (bad enough it would force me to pull over occasionally) was completely gone. It has been said many times...a good safe number is around 45k for these Jk's when one should start looking at joints. Less if it's been lifted as more stress is put on the weak own joints. Cheers !

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post #13 of 17 Old 07-05-2012, 09:19 AM Thread Starter
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Quote:
Originally Posted by Tomb Raider View Post
While "most" dw's are cured by resolving trac-bar issues...it should be noted that the other "worn/damaged" parts others spoke of can easily cause the same issue. Just replaced ball joints, never touching my trac-bar, and my death wobble went away instantly. It should be noted, I had a slightly bent "C" and needed an offset joint to put the camber and caster back in spec. Once installed, again, never touching my trac-bar....my death wobble (bad enough it would force me to pull over occasionally) was completely gone. It has been said many times...a good safe number is around 45k for these Jk's when one should start looking at joints. Less if it's been lifted as more stress is put on the weak own joints. Cheers !

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Did you watch the videos?


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post #14 of 17 Old 07-05-2012, 06:49 PM
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Yeah...after I changed out joints, lol. Good info and videos. It was just a note that ball joints CAN cause extreme death wobble.

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post #15 of 17 Old 11-20-2013, 05:34 PM
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Thanks for all the good points on checking for the death wobble. I am planning to get the Grade 8, shouldered 9/16 inch bolt for my track arm as well as a brace. Does this sound like a good fix for DW? I am as planning to get heavy duty upper an lower ball joints. I want to be proactive vs. reactive. I have had this happen to me twice.
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