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Old 03-15-2010, 05:08 PM   #1 (permalink)
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4runner rear 3links

hi everybody
i do a lot of serch an i cant found thos enswers
i made a setup that loock like that on my 93 4runner

lower links are 43" 1/2 long and at ridehight thez are at 7* whit the horizontal
thez are bolted hunder the frem at around 14" from the t-case flange and on the center of the axel on the diff

the upper link is 41" long vetical separation on the diff is 8"7/8 and on the frem the vertical is 4"7/16

when the suspention is full down the lower links is at 20* whit the horizontal

when i cycle the suspension up and down i get 7* of axelwrap

when i cycle the suspension from down to up the diff go backweard 2"


my question is
7* of axel wrap is it too mutch
my uperlink is more than 70% of the lower is it bad
lower link 43"1/2 is it too short or too long
and the axel go backweard 2" is it too mutch (oversteer)
and maybe give my some advice for panhard

i made a lot of reserch and i cant found a post for a rear 3links that explain step by step how for a dum like my i am very comfuse whit all thos term (instant cg,rollcenter,rollaxis,cg,....) i know its important but maybe i can do a setup whit minimum instruction that whill do good job and after i will learn to tune this base setup

thankyou its realy appreciate
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Old 03-15-2010, 05:15 PM   #2 (permalink)
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i say play with the calculator and see what will work on your rig. you can always move the gas tank and 4 link it too.... 4 link might make you happier
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Old 03-15-2010, 05:27 PM   #3 (permalink)
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i dont know how the 3links calculator work
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Old 03-15-2010, 05:51 PM   #4 (permalink)
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Apparently you don't know how spell check works either, or grammar for that matter.

Last edited by David D; 03-15-2010 at 05:52 PM.
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Old 03-15-2010, 05:57 PM   #5 (permalink)
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Dammit man, thats hard to read,
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Old 03-15-2010, 06:17 PM   #6 (permalink)
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I am going out on a limb and say that english is not his native language.

I would do some more searching and compare other peoples numbers to your numbers. I dont think there is a 'tell all' 3-link thread for 4runners, but you should be able to find numerous builds who have a 3-link in the rear.
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Old 03-16-2010, 03:39 PM   #7 (permalink)
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Dammit man, thats hard to read,
i am sory thrust me i do my best
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Old 03-16-2010, 03:49 PM   #8 (permalink)
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i am sory thrust me i do my best
Nothing to add other than this brings funnay!!

Dane
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Old 03-16-2010, 04:41 PM   #9 (permalink)
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i will be happy if i get a answer for only one question

today i made somme math and found i have 3.5* of oversteer but i dont know if its a lot or its ok
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Old 03-16-2010, 09:07 PM   #10 (permalink)
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I think that is pretty good for a 3 link. I think Booger Weldz posted on here at one time that the Trail Gear 3 link has 5 degrees of oversteer.
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Old 03-17-2010, 07:30 AM   #11 (permalink)
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I think that is pretty good for a 3 link. I think Booger Weldz posted on here at one time that the Trail Gear 3 link has 5 degrees of oversteer.
7*
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Old 03-17-2010, 07:59 AM   #12 (permalink)
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My attempt to translate/clean up his post:

Quote:
Originally Posted by mart1030 View Post
Hi everybody.
I did a lot of search and I cant find those answers now. I made a setup that looks like the one on my 93 4Runner.

The lower links are 43" 1/2 long, and at ride height they are at 7* from horizontal. They are mounted under the frame, approx. 14" behind the Tcase flange (single cases). They mount on the axle centerline.

The upper link is 41" long. Vertical separation on the diff is 8 7/8" and on the front the vertical separation is 4 7/16".

When the suspension is at full droop the lower links is at 20* from horizontal.

When I cycle the suspension up and down I get 7* of axle/pinion rotation.

When I cycle the suspension from down to up the diff goes backward 2".


My questions are:
-7* of axle wrap: is it too much?
-My upper link is more than 70% of the lower: is that bad?
-Lower link 43"1/2: is it too short or too long?
-The axle going backward 2": is it too much (oversteer)?
-Can anyone give my some advice for the panhard bar?

I did a lot of research and I can't find a post for a rear 3links that explain step by step how to build one for a dummy like me. I am very confused with all the terms (instant cg,roll center,roll axis,cg,....) I know its important but maybe I can do a setup with minimum instruction that will do good job and then afterwards I will learn to tune this basic setup

Thank you, your help is really appreciated
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Last edited by DRM; 03-17-2010 at 08:00 AM.
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Old 03-17-2010, 08:02 AM   #13 (permalink)
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FTY, here is my 3 link rear: https://www.pirate4x4.com/articles/pr...iews/eor_3link

I can get you link length measurements this weekend if you would like.
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Old 03-17-2010, 10:57 AM   #14 (permalink)
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The link above would be cooler if the pics worked, or is it my computer? if it's me then to me!
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Old 03-17-2010, 10:59 AM   #15 (permalink)
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Originally Posted by 4runnerboy View Post
The link above would be cooler if the pics worked, or is it my computer? if it's me then to me!
They worked for me in FF, guess they were cached. I'll see about getting them fixed.
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Old 03-17-2010, 02:22 PM   #16 (permalink)
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FTY, here is my 3 link rear: https://www.pirate4x4.com/articles/pr...iews/eor_3link

I can get you link length measurements this weekend if you would like.
thankyou drm
long time ago i found your post but i dont know why i cant see the picture and its make me mad
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Old 03-17-2010, 02:27 PM   #17 (permalink)
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I think that is pretty good for a 3 link. I think Booger Weldz posted on here at one time that the Trail Gear 3 link has 5 degrees of oversteer.
i think its because my lower link are whay longer then the tg kit
i think
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Old 03-17-2010, 03:58 PM   #18 (permalink)
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They worked for me in FF, guess they were cached. I'll see about getting them fixed.
when i click on you picture thers a massege and it says (warning include failed to open stream)
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Old 03-17-2010, 04:23 PM   #19 (permalink)
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FTY, here is my 3 link rear: https://www.pirate4x4.com/articles/pr...iews/eor_3link

I can get you link length measurements this weekend if you would like.
yes i will be verry happy if you do that for me
thankyou
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Old 03-19-2010, 09:44 AM   #20 (permalink)
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Originally Posted by mart1030 View Post
i think its because my lower link are whay longer then the tg kit
i think
somewhat, it would be different based on link angles at ride height
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Old 03-19-2010, 08:29 PM   #21 (permalink)
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FTY, here is my 3 link rear: https://www.pirate4x4.com/articles/pr...iews/eor_3link

I can get you link length measurements this weekend if you would like.
I'd also be interested in your link numbers.
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Old 03-21-2010, 03:25 PM   #22 (permalink)
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somebody can give me the link for the 3 links calculator
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Old 03-21-2010, 06:01 PM   #23 (permalink)
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ok i found one
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Old 03-23-2010, 04:29 PM   #24 (permalink)
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ok i put some number in the 3 links calculator

anti-squat 86%

roll axis slope .182"

roll axis angle 10.3*

roll center height 28.84"

instant center x-axis 100.57"

instant center z-axis 35.42"


tell me what you think about that
thankyou
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Old 03-23-2010, 11:45 PM   #25 (permalink)
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That roll axis angle is very steep.
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