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Old 11-27-2013, 06:29 PM   #1
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spring over vs. spring under

Can someone tell me the advantages of soa vs sue? and what mods I would have to make to change to soa?

I have a "64 cj5 and was trying to get a little more of a lift without spending allot of cash.

Any suggestions or info would be greatly appreciated.

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Old 11-29-2013, 07:53 AM   #2
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What is your end goal with the jeep? How high you want to be?

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Old 11-30-2013, 12:48 PM   #3
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well it has a 2 inch lift now, due to shackles which i would love to get rid of. Would like to get 3 or 4 inch lift without them
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Old 11-30-2013, 01:43 PM   #4
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I've never done a spring over on a jeep, but I did lift a '78 scout that way once. Everything about it was a pain in the ass! Buy hi-lift springs and thank me later
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Old 11-30-2013, 01:50 PM   #5
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To get it "right" I had to:
Change brake lines
Fabricate new shock mounts
Change shocks
Extend front drive shaft
Buy drop pitman arm
Fabricate new drag link
And probably more that I can't think of
Maybe someone who has done a cj5 could chime in if jeeps are easier...
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Old 11-30-2013, 04:40 PM   #6
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doing a spring over on a jeep is not difficult and it can be very inexpensive ( if you don't count your time) and IF YOU KNOW WHAT YOU ARE DOING..One of the best things about a spring over,in my opinion is that a spring over with stock springs will ride a lot better than any highly arched springs that I have ever experienced
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Old 12-01-2013, 08:33 AM   #7
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First I am not a fan of shackle lifts. My Cj has some beefy ones that ended up adding a small lift because of size but shackle lifts are cheap and easy but you do sacrifice in some areas. But sounds like you already know this.

Second, as already mentioned the best ride from a SOA would be with a stock height spring. Since you are still running stock springs you are cool here. Depending on your front axle you should gain the lift you are looking for with the diameter of the tube. Easy enough to throw a tape on. But again sounds like you already know this.

Third, SOA installs are not difficult if you a confident welder, have the tools and the knowledge to install. Completing a SOA versus a standard lift is a example of choosing to spend time over $. We all know of tons of stuff on jeeps that we weight time over cost. The information already listed tells ya what you may have to modify/change for a SOA.

Side note - I don't know your year cj's capabilities but you might investigate if you can install YJ springs. I have OME YJ springs on my CJ7 and they are awesome.
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Old 12-01-2013, 09:19 AM   #8
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to determine the amount of lift from a spring over,add the axle tube diameter,the spring perch heigth,the new spring perch heigth and the thickness of the spring pack..it will usually add up to 5 or 6 inches
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Old 12-01-2013, 11:14 AM   #9
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Thank you all for the info. I really appreciate the help.

Yes Demp. I don't like shackle lifts either, but she had them on her when I bought her. I originally bough her to work on the farm. But after years of roading and building first an FJ then a JK, the bug has bit me again. The problem is, having been built in brazil in '64, finding info and getting parts is difficult. And importing them is out of the question due to import taxes here,
I am going to have to give this some thought. 5 inches would be allot considering the mountains here.I can see myself rolling down the mountain sideways, which could be a problem.
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Old 12-01-2013, 03:25 PM   #10
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Quote:
Originally Posted by lost jeeper View Post
Thank you all for the info. I really appreciate the help.

Yes Demp. I don't like shackle lifts either, but she had them on her when I bought her. I originally bough her to work on the farm. But after years of roading and building first an FJ then a JK, the bug has bit me again. The problem is, having been built in brazil in '64, finding info and getting parts is difficult. And importing them is out of the question due to import taxes here,
I am going to have to give this some thought. 5 inches would be allot considering the mountains here.I can see myself rolling down the mountain sideways, which could be a problem.
What engine you running? What is your elevation? Yeah shelf roads can be a little nerve racking when running a narrow jacked up jeep.
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Old 12-02-2013, 02:40 PM   #11
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Keep in mind that axle wrap on a SOA swap with stock springs will be viscous!
Than add to that all the other issues with 5-6" of SOA lift you may be better off staying SUA.
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Old 12-03-2013, 03:40 AM   #12
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It's the original hurricane straight 6. Just did a carb swap to a weber carb. Runs much better.I managed to put 33's on her with the help of 2" spacers and the shackles. Here in brazil, since parts are so expensive, they replace the springs with toyota springs to get a better ride.
Added some new shocks and took a couple leafs out of the springs to soften the ride a little. Just got delivery of the toyota springs yesterday. They are about 10"s longer than stock, so should make the ride allot better. Won't give me any more lift but will make it easier on the back!

Was considering adding addco sways to try and lessen the lean she gets on turns. Any ideas?
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Old 12-03-2013, 07:57 PM   #13
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stay spring under
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Old 12-04-2013, 08:25 PM   #14
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Thanks Rich, I think I will.
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Old 02-04-2014, 08:52 PM   #15
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SUA with 2 inch springs and sawzall for clearance. SOA issues with axle wrap. Traction bars tough to get right.

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