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  #1  
Old September 16th, 2014, 12:33 PM
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Andrew O'Rourke
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My front end shakes

Just replaced all tie rods, drop link, all shocks and front stabilizer, had alignment done and seems worse than before?
Any ideas...
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  #2  
Old September 16th, 2014, 12:37 PM
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Chris Davis
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Swivel preload was my cause. Pan Hard Rod bushings need a look, too. And check radius arms.

I am still amazed that the swivel preload took away my "death wobble". But there it is.
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  #3  
Old September 16th, 2014, 12:40 PM
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Tires are properly inflated and balanced right?
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  #4  
Old September 16th, 2014, 12:47 PM
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Andrew O'Rourke
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Balancing and tire pressure will be checked?
Had a shimmy before I replaced all the suspension bits, but now it is much worse
Do we have a technical section I could look up swivel preload ect?
I did a search for "Front end shaking" and got nada?
Any help would be appreciated
Want it fixed but need to understand the problem, before I let someone mess with my D
Thanks
Andy in New York
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  #5  
Old September 16th, 2014, 01:30 PM
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Chris Davis
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http://www.landroverresource.com/ For rave manual detail the proceedure. Do a search under death wobble
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  #6  
Old September 16th, 2014, 01:35 PM
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Matthew Scanlon
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Check your Panhard bushings first, I went through the panhard bushings on two trucks shortly after lifting them. The quick easy way to see if they are shot is to have someone rock your truck back and forth as you are looking at them, if there is a lot of play start there. If you have a lifted truck it is always a good idea to install an adjustable panhard rod to center the axle under the truck.

If the bushings are good check the swivel preload

http://landroverforums.com/forum/dis...preload-36607/
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  #7  
Old September 16th, 2014, 01:49 PM
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what's basically happening is that you have a mass, your rover, and it converts energy to rotational kinetic energy. somewhere between the energy conversion of the engine to the rotational kinetic energy, you are displacing energy along a varying degree of amplitudes.

so you have to ask yourself, what's the greatest probability (path) that energy is being displaced along the amplitude rather than forward kinetic motion? start with the tires, wheels, swivel, etc. anywhere there is a conversion from rotational kinetic energy to forward momentum.
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  #8  
Old September 16th, 2014, 02:19 PM
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Rick Mabus
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To add to your list of culprits, and to provide a simplified thought to what ranker just posted, have your checked your ujoints on your front and rear drive shafts lately? seams to me that something causing this was being muted some but worn suspension parts. Now that your parts are all snug, it is amplifying your problem. I have had a similar witch hunt on my wife's suburban and finally determined I have a damaged rear drive shaft.
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  #9  
Old September 16th, 2014, 04:21 PM
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Swivel pre-load is a very common cause of what you describe. Deal with horse before zebras.
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  #10  
Old September 16th, 2014, 04:49 PM
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My preloads are on my short list for the fall season of garage time.
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  #11  
Old September 16th, 2014, 04:51 PM
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I had the same issue, I replaced the pan hard bushing and did the pre tension on the swivel pins at the same time, problem solved. On the note of while you're at it, if your truck is old, replace the pins and bushings and seals at the same time, ask me how I know?

------ Follow up post added September 16th, 2014 03:53 PM ------

Quote:
Originally Posted by rankar View Post
what's basically happening is that you have a mass, your rover, and it converts energy to rotational kinetic energy. somewhere between the energy conversion of the engine to the rotational kinetic energy, you are displacing energy along a varying degree of amplitudes.

so you have to ask yourself, what's the greatest probability (path) that energy is being displaced along the amplitude rather than forward kinetic motion? start with the tires, wheels, swivel, etc. anywhere there is a conversion from rotational kinetic energy to forward momentum.
I love this answer,
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  #12  
Old September 16th, 2014, 04:59 PM
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I should've defined amplitude. Amplitude is the amount of displacement that one of the parts is making from its point of rest.
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  #13  
Old September 16th, 2014, 05:39 PM
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Andrew O'Rourke
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Thanks All
Rave and Chris's pictorial repair helped a great deal.
Think all right, the problem existed before I replaced all the front end stuff and when I did it put a fine point on that fault.
Balance, check inflation and preload inspection are all on the to do list.
I am on New York and would look to assembled experts to who you recommend for care and feeding of our Defenders?
Heard of a guy in the Bronx? Near Pelham Parkway?
Any info?
Thanks again
Andy in New York

------ Follow up post added September 16th, 2014 05:42 PM ------

Bye the way, I noticed oil/lube seepage from the bottoms of the swivels, like weeping in a way, Would this be related to the Pre load situation?
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  #14  
Old September 16th, 2014, 06:48 PM
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Quote:
Originally Posted by CavemanDiesel View Post
On the note of while you're at it, if your truck is old, replace the pins and bushings and seals at the same time, ask me how I know?

------ Follow up post added September 16th, 2014 03:53 PM ------



I love this answer,
Eric, how do you know?
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  #15  
Old September 16th, 2014, 06:48 PM
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Eric Smirh
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Quote:
Originally Posted by Pinballking2 View Post
Thanks All
Rave and Chris's pictorial repair helped a great deal.
Think all right, the problem existed before I replaced all the front end stuff and when I did it put a fine point on that fault.
Balance, check inflation and preload inspection are all on the to do list.
I am on New York and would look to assembled experts to who you recommend for care and feeding of our Defenders?
Heard of a guy in the Bronx? Near Pelham Parkway?
Any info?
Thanks again
Andy in New York

------ Follow up post added September 16th, 2014 05:42 PM ------

Bye the way, I noticed oil/lube seepage from the bottoms of the swivels, like weeping in a way, Would this be related to the Pre load situation?
The leaking seals don't cause the death wobble, but it could tell you that the old bits need to be replaced, I think it means that you should replace all the seals and any moving parts . The parts are not to expensive. You don't want to have steering problems, they are not to difficult to do.

------ Follow up post added September 16th, 2014 05:52 PM ------

Quote:
Originally Posted by rankar View Post

Eric, how do you know?
Well you asked, I adjusted the pre tension on the swivel pins and did not replace the seals, (after people told me to) Now I have grease all over one of my boost. I can hardly sleep at night,
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  #16  
Old September 16th, 2014, 07:26 PM
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Andrew O'Rourke
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Well, checked he tire pressure and had 40psi in drivers and 30 odd psi in passenger, so reset to 28 on both up front and 35 in rears.
Tires in front are balanced
Problem still exists?
Back to the plan
Preload then bushings?
And CV's on front axle
Andy
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  #17  
Old September 16th, 2014, 07:32 PM
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Is your steering box centered? Does your truck feel more vague steering left than right?
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  #18  
Old September 16th, 2014, 08:18 PM
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Andrew O'Rourke
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No but, I experience the wobble at low speed, when the truck hit a rut or pothole, which there are Many in the New York roadways. Point is it happens at very low speeds and doesn't take a big bump to get the wheels swaying?
I did have the whole drag link and ball joint replaced?
Could it have been installed wrong? As in out of center?
Andy
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  #19  
Old September 16th, 2014, 10:25 PM
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Quote:
Originally Posted by Pinballking2 View Post
Well, checked he tire pressure and had 40psi in drivers and 30 odd psi in passenger, so reset to 28 on both up front and 35 in rears. Tires in front are balanced Problem still exists? Back to the plan Preload then bushings? And CV's on front axle Andy
I was about to do my tie rod ends to try to get rid of death wobble at 45 mph but decided to check tires first. Had similar pressure differences so corrected and rotated the tires and it went away completely. One of the tires that was on the front has about 12 weights on it, so I'm sure it probably needs to be rebalanced. It just makes less impact on the back. Still could be any of the other things mentioned but might be worth rotating tires to see.
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  #20  
Old September 17th, 2014, 07:24 AM
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rebuild the swivels and report back
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