Do lift YJ springs yield more or less lift than CJ lift springs? - JeepForum.com
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Unread 04-27-2013, 04:38 PM   #1
CJ7KAHUNA
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Do YJ lift springs yield more or less lift than CJ lift springs?

Some day in the not too distant future I want to replace my 4" lift springs with YJ lift springs. Does anyone know if the YJ lift springs yield the same amount of lift as CJ lift springs? or is it more or less?

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Unread 04-27-2013, 05:56 PM   #2
spottedfrog
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I have asked this before. No one seems to be able to give a straight answer.
My gut says that they will provide less. reason being that they are flatter, and the shackles are longer. SO I would think that you would need longer shackles that YJ stock to achieve the same lift. Again my guy says that it MIGHT be a 1/2" difference.

But I don't REALLY know. Only a hypothesis.
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Unread 04-27-2013, 06:16 PM   #3
CSP
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One would have to compare a CJ spring and YJ spring of the same brand and advertised lift on the same CJ to really know that answer.
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Unread 04-27-2013, 06:34 PM   #4
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I replaced my stock CJ springs with stock YJ springs. Can't tell any difference in ride height judging by the drag ling and tie rod (they are still perfectly parallel as they were before).
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78 CJ7 258 TH400/Dana18 SOA/stock YJ springs 35" General Grabbers.
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Unread 04-27-2013, 06:42 PM   #5
spottedfrog
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skizriz, Did you use the stock YJ shackles? or conversion ones. did you use a conversion hanger?
I'm curious what the total height gained from the SHACKLE set up is. THAT will tell us how much "flatter" and "lower" the YJ springs are.

Side note: I also wonder if the real reason that YJ springs flex more isn't that they are "softer" but that they use a longer shackle to allow for a greater amount of easier flex, allowing the spring to compress more fully (not necessarily the whole picture but a lot of it). A NO-NO on a CJ as many peeps will say, "stay away from a shackle lift", but when they convert to YJ springs, that is just what they are doing.
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Unread 04-27-2013, 06:52 PM   #6
skizriz
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Quote:
Originally Posted by spottedfrog View Post
skizriz, Did you use the stock YJ shackles? or conversion ones. did you use a conversion hanger?
I'm curious what the total height gained from the SHACKLE set up is. THAT will tell us how much "flatter" and "lower" the YJ springs are.

Side note: I also wonder if the real reason that YJ springs flex more isnt that they are "softer" but that they use a longer shackle to allow for a greater amount of easier flex, allowing the spring to compress more fully (not necessarily the whole picture but a lot of it). A NO-NO on a CJ as many peeps will say stay away from a shackle lift, but when they convert to YJ springs, that is just what they are doing.
Used the same shackles as I always had with the CJ springs. They are maybe 1/2" longer than stock.
I used a rear CJ shackle hanger on the front for the conversion.
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