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Unread 11-25-2012, 08:16 PM   #1
Dake
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caster angle and death wobble

I getting death wobble I added 1" shackles. Now my caster is around 10. I know it needs to be around 7. Can to much caster cause death wobble? The shackles said no lift but I got the inch. Everything is tight and in good shape tie rods and ball joints.

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Unread 11-26-2012, 01:15 AM   #2
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So do you have lift shackles or not? What's the length and design? What kind of lift are you running? Do you have trackbars?
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Unread 11-26-2012, 01:27 AM   #3
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They are crown boom shackles. No track bars. I have more shackle reversal with buggy springs. RC 6" lift. 3" drop pitman arm.
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Unread 11-26-2012, 01:33 AM   #4
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The shackle added one inch. I was not wanting more lift. The last inch got something out of wack.
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Unread 11-26-2012, 03:34 AM   #5
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OI would say the added castor helped amplify an existing problem. Check for loose anything especially the ball joints since thats the mist directly affected part from the change.
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Unread 11-26-2012, 08:43 AM   #6
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I just changed the ball joints a little over two years ago! I hope that's not it they where a pain in the *** to get out.
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Unread 11-26-2012, 08:43 AM   #7
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Pics.
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Unread 11-26-2012, 10:01 AM   #8
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Unread 11-26-2012, 10:03 AM   #9
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Some how I posted some more than once?
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Unread 11-26-2012, 10:07 AM   #10
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There's your problem. Your drag link angle is too severe and you need to possibly flip your tie rod to correct the angle. It's obvious that the current steering setup would cause bump steer.
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Unread 11-26-2012, 10:13 AM   #11
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Quote:
Originally Posted by Anticanman View Post
There's your problem. Your drag link angle is too severe and you need to possibly flip your tie rod to correct the angle. It's obvious that the current steering setup would cause bump steer.
Not to mention the inverted T steering system is a poor way go about things. A true crossover steering set up with proper geometry (scrub radius and Ackerman for starters) will do wonders.
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Unread 11-26-2012, 10:52 AM   #12
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Quote:
Originally Posted by Anticanman View Post
There's your problem. Your drag link angle is too severe and you need to possibly flip your tie rod to correct the angle. It's obvious that the current steering setup would cause bump steer.
as long as his suspension actually moves then possible bumpsteer yes but the issue is DW. many of us have had undesirable drag link angles and no DW.


Quote:
Originally Posted by jsawduste View Post
Not to mention the inverted T steering system is a poor way go about things. A true crossover steering set up with proper geometry (scrub radius and Ackerman for starters) will do wonders.
yes but again there are far more jeeps that look like the OPs that dont have DW and dont have crossover steering. there was a time when there was no such thing as crossover on a dana 30. any crossover kit will not affect scrub radius and ackerman.

DW is usually a combination of things. put the caster back to normal and go from there. i fixed a plethora of stuff and each time it got better but didnt go away completely. the thing that finally fixed mine was proper toe-in.
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Unread 11-26-2012, 11:10 AM   #13
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Agree with ^^^, put it back to what you had before the DW and see if it goes away...
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Unread 11-26-2012, 01:32 PM   #14
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I just changed the ball joints a little over two years ago! I hope that's not it they where a pain in the *** to get out.
This is your answer. I'm willing to bet you didn't check the ball joints cause you did them 2 years ago. Life expectancy on a ball joints with large oversize tires is severely reduced. Add to that the fact that many replacements are crap. I would check these again. You added 3 degrees of castor and now you have dw. You just changed the load on the ball joi ts considerably.
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Unread 11-26-2012, 03:06 PM   #15
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I have a 4d shims Im going to put in this weekend. I will first try the stock shackles.
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