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Unread 10-13-2013, 05:54 PM   #1
Krum81
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75 cj soa??

In the process of a soa but learned that my cj spring is quite a bit shorter than a yj spring. Curious what bracket would you move? The front or rear?

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Unread 10-13-2013, 05:58 PM   #2
Krum81
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Cj is 19 1/2 from center of bushing to center pin. Yj is 22 1/4
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Unread 10-13-2013, 05:59 PM   #3
skizriz
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You need to move the shackle hanger forward for YJ springs.
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78 CJ7 258 TH400/Dana18 SOA/stock YJ springs 35" General Grabbers.
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Unread 10-13-2013, 08:33 PM   #4
CSP
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Quote:
Originally Posted by skizriz View Post
You need to move the shackle hanger forward for YJ springs.
That's true for a '76 and up CJ, however this CJ is not in that range.

On a '75 and older you move both the fixed hanger (and change it to a later model CJ hanger) and the shackle hanger.

I can't tell you the amount to move each but the axle needs to remain in pretty much the same position so that the front driveshaft doesn't end up being too long and the tires don't end up in the back of the fender openings and at the other extreme so that the steering doesn't end up with the tierod contacting the drag link. It's a slippery slope.
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Unread 10-13-2013, 09:50 PM   #5
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Thanks , I have the axle centered up to the original location and marked new hanger locations . if I only moved the front hanger it would push the whole axle forward 3 to 4 inches and would need to change steering box...
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Unread 10-14-2013, 02:35 AM   #6
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My bad. I never even noticed the '75 in the thread title.

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78 CJ7 258 TH400/Dana18 SOA/stock YJ springs 35" General Grabbers.
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Unread 10-14-2013, 06:36 PM   #7
Deeznutz73
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I bought the spring under from RRO for my 73. The instructions and pictures of the parts are on my thread http://www.jeepforum.com/forum/f8/id...r-cj5-1525201/ .They're the same instructions for both from what I gathered. As for your question, you'll need to move the spring hanger forward(rear) and I think you'll have to move the forward spring hangers back. You'll most likely have to change your shackle hangers also, since your springs are 1 1/2" wide and YJ's are 2 1/2".
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Unread 10-15-2013, 09:33 AM   #8
Grumpy_one
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Quote:
Originally Posted by skizriz View Post
You need to move the shackle hanger forward for YJ springs.
Quote:
Originally Posted by CSP View Post
That's true for a '76 and up CJ, however this CJ is not in that range.

On a '75 and older you move both the fixed hanger (and change it to a later model CJ hanger) and the shackle hanger.

I can't tell you the amount to move each but the axle needs to remain in pretty much the same position so that the front driveshaft doesn't end up being too long and the tires don't end up in the back of the fender openings and at the other extreme so that the steering doesn't end up with the tierod contacting the drag link. It's a slippery slope.
I thought YJ springs in a 76 and up was a straight bolt in.
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Unread 10-15-2013, 10:23 AM   #9
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They are a bolt in for the rear springs. In the front they are after you move the shackle hangers and come up with a new ubolt plate arrangement as well as wider shackles.
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Unread 10-15-2013, 10:34 AM   #10
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Quote:
Originally Posted by CSP View Post
They are a bolt in for the rear springs. In the front they are after you move the shackle hangers and come up with a new ubolt plate arrangement as well as wider shackles.
I've already got 2.5" confer shackles in the front (2.5" Rancho lift, which will be for sale soon) I might have moved them forward from the last lift. That was over 20 years ago. Still working on the rear. Thanks
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Unread 10-15-2013, 11:34 AM   #11
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If your Rancho front springs are CJ springs, they are not 2.5" wide. They may be 2.5" lift springs, but they will be 2" wide if CJ springs.
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Unread 10-15-2013, 04:02 PM   #12
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YJ bushings = happy frame
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Unread 10-15-2013, 09:22 PM   #13
Grumpy_one
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Quote:
Originally Posted by CSP View Post
If your Rancho front springs are CJ springs, they are not 2.5" wide. They may be 2.5" lift springs, but they will be 2" wide if CJ springs.
Part number 44902, says it's for CJ 76 and up. Probably why I did the confer shackles when I did this lift.
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Unread 10-16-2013, 11:43 AM   #14
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Grumpy I'm not sure how your Confer shackles are entering the picture here. If you have CJ springs you have CJ width shackles and a YJ spring will not fit in them.

If you mean that there is 2.5" between the sides of the shackle for the spring to fit into, that is not wide enough. A shackle for a 2.5" wide spring will have 3" between the sides. You have to remember that the bushings have a shoulder on them that also has to fit in the shackle, not just the springs.
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Unread 10-16-2013, 01:00 PM   #15
Grumpy_one
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Quote:
Originally Posted by CSP View Post
Grumpy I'm not sure how your Confer shackles are entering the picture here. If you have CJ springs you have CJ width shackles and a YJ spring will not fit in them.

If you mean that there is 2.5" between the sides of the shackle for the spring to fit into, that is not wide enough. A shackle for a 2.5" wide spring will have 3" between the sides. You have to remember that the bushings have a shoulder on them that also has to fit in the shackle, not just the springs.
Makes sense. I must have CJ springs in the front and will be in the market for YJ shackles.
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