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Help! Death Wobble

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Offline Medford

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Re: Help! Death Wobble
« Reply #15 on: August 11, 2010, 02:52:02 PM »
ack;
same story on a tracker with independant front end?  Drop pitman & drop drag link mounted to the center link to will correct the bumpsteer?
96 Tracker LSI, 2.5" Pro Comp lift with cooper 30X9.5 STT tires.  A bit of trim and beating to make the front work.

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Offline wildgoody

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Re: Help! Death Wobble
« Reply #16 on: August 12, 2010, 07:46:48 AM »
The longer the link the less it changes the wheels under suspension compression.
This is the basis on the center mount tierods I built, and that you asked for pics
on   ::)

Wild
Real Trucks Are Built, Not Bought,
And Chrome Don't Get Ya Home.  

An armed man is a citizen. An unarmed man is a subject.

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Offline Medford

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Re: Help! Death Wobble
« Reply #17 on: August 13, 2010, 04:38:51 PM »
Wild- What you are saying is I need to just patiently wait for the pictures and stop trying to recreate the wheel. I must admit it is nice to have all of the older brothers on this site (no by age, but rather by experience) holding my hand through these high speed tracker mods.
96 Tracker LSI, 2.5" Pro Comp lift with cooper 30X9.5 STT tires.  A bit of trim and beating to make the front work.

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Offline ack

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Re: Help! Death Wobble
« Reply #18 on: October 08, 2010, 05:58:05 AM »
ack;
same story on a tracker with independant front end?  Drop pitman & drop drag link mounted to the center link to will correct the bumpsteer?

On an IFS system, the problem is a bit different since the draglink is attached to a segment of the articulated tierod that does not change position in the vertical plane.  

However, a suspension lift would affect the operating angles of the articulated segments of the IFS tierod!

I would suspect that either raising the hub end of the tierod or lowering the center section of the tierod would solve this problem.  Unfortunately, none of my TracKicks are lifted so I have no direct experience with IFS bumpsteer...

Perhaps it is time to create an IFS bumpsteer animation to see if changing the tierod geometry with a suspension lift actually creates IFS bumpsteer...

Ah, the power of PhotoShop...
« Last Edit: October 08, 2010, 06:00:24 AM by ack »
Ack

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Ack's FAQ  http://www.acksfaq.com

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Offline wildgoody

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Re: Help! Death Wobble
« Reply #19 on: October 08, 2010, 07:57:48 AM »
You are correct, as usual.  :) The center link I have designed solves 2 problems with lifted
IFS systems, it stops the center link from rotating, which causes high speed darting
when you hit small chatter bumps, and it reduces the forces that tend to want to twist
the center link by getting the tie rods back into a closer parallel plain with the center link

Wild
Real Trucks Are Built, Not Bought,
And Chrome Don't Get Ya Home.  

An armed man is a citizen. An unarmed man is a subject.

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Offline bentparts

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Re: Help! Death Wobble
« Reply #20 on: October 08, 2010, 05:22:04 PM »
Now that sounds like a damn good idea wild, photo or drawing? Care to share?
The usual stuff, and 2nd generation Air to liquid intercooled TURBOCHARGER

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Offline wildgoody

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Re: Help! Death Wobble
« Reply #21 on: October 09, 2010, 02:03:45 AM »
This is super secret ninja sauce stuff  :-X

 ;)

I'll get a drawing up soon, my part is too ugly to
post, I broke it in Moab and had to get it welded up
and now I need to make a new custom part

Wild
Real Trucks Are Built, Not Bought,
And Chrome Don't Get Ya Home.  

An armed man is a citizen. An unarmed man is a subject.

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Offline bentparts

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Re: Help! Death Wobble
« Reply #22 on: October 09, 2010, 04:24:10 AM »
I get it, I think. ;)
The usual stuff, and 2nd generation Air to liquid intercooled TURBOCHARGER

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Offline wildgoody

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Re: Help! Death Wobble
« Reply #23 on: October 09, 2010, 11:43:43 AM »
OK, I broke down and made a picture, Just for you Medford,
since you have been waiting so patiently




Dang, came out a little small, just save it and view on your own computer, you can see all the
details that way, and the text, should open with any picture viewer or browser it's a GIF format

Wild
« Last Edit: October 09, 2010, 11:48:55 AM by wildgoody »
Real Trucks Are Built, Not Bought,
And Chrome Don't Get Ya Home.  

An armed man is a citizen. An unarmed man is a subject.

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Offline ack

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Re: Help! Death Wobble
« Reply #24 on: October 09, 2010, 01:19:26 PM »
You can also right click on the picture then select "properties" from the menu that appears.  Cut and paste the picture's URL as it appears in the resulting window into your browser's URL field at the top.  The picture will appear much larger and easier to read as a new browser page by itself!

The bottom design looks very much like what you see in an ATV IFS suspension.

The angle of the tierods are much less steep - which, I think, should improve handling.

I also noticed this type of centered tierod setup on a VW dune buggy recently.

However, I think that a setup that keeps the stock tierod length but lowers/raises either end to the point of matching the stock tierod geometry would be better...

Then again, we may have one of those "difference that makes no difference" situations here, though...

Bonus points:  What famous character in a Television series is attributed to the statement "The difference that represents no difference IS no difference"?

 :laugh:
Ack

'88 Samurai, '88.5 Samurai TT, '11 Ford Transit Connect XLT
Ack's FAQ  http://www.acksfaq.com

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Offline wildgoody

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Re: Help! Death Wobble
« Reply #25 on: October 09, 2010, 01:41:45 PM »
Yes, if you want to use stock parts, keeping with the stock geometry
is the best way to go, also makes parts replacement much easier.

This is of coarse a sketch and not to scale as well as dimensions are
not absolute, it is simply the concept to improve overall steering and
handling of our lifted trucks

Wild 
Real Trucks Are Built, Not Bought,
And Chrome Don't Get Ya Home.  

An armed man is a citizen. An unarmed man is a subject.

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Offline bentparts

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Re: Help! Death Wobble
« Reply #26 on: October 11, 2010, 04:10:48 PM »
Thanks Wild, appreciate the drawing.
The usual stuff, and 2nd generation Air to liquid intercooled TURBOCHARGER

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Offline Medford

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Re: Help! Death Wobble
« Reply #27 on: October 11, 2010, 10:16:38 PM »
Thanks Wild!  Was really looking forward to some greasy undercarriage pics of the turbo beast, but this does the trick for sure.  I know you spent a fair amount of time on the drawings, and I am thankful. SS
96 Tracker LSI, 2.5" Pro Comp lift with cooper 30X9.5 STT tires.  A bit of trim and beating to make the front work.

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Offline doughboy0379

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Re: Help! Death Wobble
« Reply #28 on: October 12, 2010, 12:34:36 AM »
One mile have you figured out your problem yet?
86 Samurai, SPOA, 3" HD leaf springs, 31/10.5/15 Big-O XT Tires, K&N Air Filter, Doug Thorey Header, more coming when I find the funds :)

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Offline one mile

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Re: Help! Death Wobble
« Reply #29 on: October 19, 2010, 05:13:03 PM »
Sorry it took so long to reply.....NOPE! I have just put on the drop pitman and had an alignment done and it is still doing it. I think I will have to take off those T.T. Missing links I have to see if they have anything to do with it.....
"WORK SMART NOT HARD"