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Old Feb 24, 2009 | 09:24 AM
  #1  
90inworks's Avatar
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From: Sedro Woolley washington
shackles

what is the lenghth of stock rear shackles for my 94? im going to make new ones but need to know how big i will need to make them to get 3inches of lift. im taking my body lift out and need to make the rear end still clear the 35's.
help asap!
thanks
Clint
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Old Feb 24, 2009 | 09:33 AM
  #2  
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Would it be that hard to go measure..?
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Old Feb 24, 2009 | 09:37 AM
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From: Sedro Woolley washington
sence im in class right now yes. and i heard some thing that they have to be an inch and half for one inch of lift. so whats the true ratio it has to be
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Old Feb 24, 2009 | 09:38 AM
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From: Oklahoma State
They are pretty short, just from memory maybe 4.5" at the most. EDIT: from 4crawlers link below they are 3.5" center to center. Here's a pic if that helps:



If I were making some I'd copy as close as possible 4crawlers design, they are the best design I've seen. One of the best things about them is the nuts can't loosen up as you drive them. http://www.4crawler.com/4x4/ForSale/Shackles.shtml At least read his info, it will answer most questions.

Quote from link above:
Given a spring with the axle located about midway on the leaf, every 2" of extra shackle will equate to 1" extra height at the axle. Usually, you'll get a bit more than that, since the longer shackle won't be kicked back as far. So, for a rule of thumb, figure between 1/2 and 2/3 of the extra shackle length will be seen as lift at the axle

Last edited by mt_goat; Feb 24, 2009 at 09:47 AM.
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Old Feb 24, 2009 | 09:42 AM
  #5  
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From: Temecula Valley, CA
reading material:
http://www.4crawler.com/4x4/ForSale/Shackles.shtml

edit- mt_goat beat me to it.

Last edited by abecedarian; Feb 24, 2009 at 09:43 AM.
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Old Feb 24, 2009 | 09:46 AM
  #6  
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From: Sedro Woolley washington
i have read that 3 times now and still question is not answered. i need to know what length my shackles need to be (hole to hole) to get 3 more inches of lift. if the shackles were straight up and down they could just be made 3inches longer than stock. but because they are at a angle i need to know the ratio for lenghth to how much lift i will get. if that makes sence.
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Old Feb 24, 2009 | 09:50 AM
  #7  
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From: Oklahoma State
Originally Posted by 90inworks
i have read that 3 times now and still question is not answered. i need to know what length my shackles need to be (hole to hole) to get 3 more inches of lift. if the shackles were straight up and down they could just be made 3inches longer than stock. but because they are at a angle i need to know the ratio for lenghth to how much lift i will get. if that makes sence.
See the quote in post #4
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Old Feb 24, 2009 | 09:52 AM
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So 3 " lift would be achieved with 6" longer then stock shackles..
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Old Feb 24, 2009 | 09:54 AM
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From: Temecula Valley, CA
Originally Posted by mt_goat
See the quote in post #4
which assuming 3" center-to-center on the stock shackle equates to nearly 9" long center-to-center on a modified shackle.
Too long, in my opinion, and could cause the rear to shift excessively side-to-side on the shackles.
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Old Feb 24, 2009 | 09:56 AM
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That being said, OP, Would new springs be out of the question..? Seems like the best bet to me...
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Old Feb 24, 2009 | 09:58 AM
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From: Oklahoma State
Originally Posted by abecedarian
which assuming 3" center-to-center on the stock shackle equates to nearly 9" long center-to-center on a modified shackle.
Too long, in my opinion, and could cause the rear to shift excessively side-to-side on the shackles.
Just for the record, I didn't say I recommended doing it that way either.
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