Suspension Upgrade - JeepForum.com

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post #1 of 24 Old 02-26-2017, 03:50 PM Thread Starter
AZDeez
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Suspension Upgrade

So I have a 94 XJ Sport 2wd 4.0 that i use for getting around town with all my tools in the back and have noticed that i am probably overloading the suspension. In fact when I was fully loaded one day my rear spring was flat across. Soooo I went searching the forums for an upgrade not to lift but to increase payload. If this ends up in a slight lift I am sure a little nose down would not be deal killer. I was unable to figure if there is a spring swap from something else or a suggested aftermarket product would help.
Thanks in advance.


88 YJ 4.2, 3.5 BDE Spring lift, 33s, - Her WIP
94 XJ 2wd utility work vehicle - no mods
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post #2 of 24 Old 02-26-2017, 03:59 PM
92choochoo
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Add a leaf is an option if you looking for something on the cheap.

The downside being the single leaf your adding to your existing pack wont last long if its doing the work of worn out springs.

A better option would be all new leaf springs packs. Their about $100 and 4 very hard bolts to remove.
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post #3 of 24 Old 02-26-2017, 04:32 PM Thread Starter
AZDeez
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So a new standard pack or is there a stiffer pack that will fit without mod?

88 YJ 4.2, 3.5 BDE Spring lift, 33s, - Her WIP
94 XJ 2wd utility work vehicle - no mods
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post #4 of 24 Old 02-26-2017, 04:54 PM
92choochoo
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Several places sell replacement heavy duty leaf springs. Might be a good option for you.
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post #5 of 24 Old 02-26-2017, 08:36 PM
Charley3
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An add-a-leaf would work, but they ride terribly bad IME.

I think a better solution would be Dorman replacement springs. You can buy them from many places online or order your local Oreilly store. Try RockAuto.com online. If RockAuto doesn't have them, then Google for Dorman Cherokee XJ rear springs.

Dorman prices are affordable and quality is good, IME. Dorman products are made in China, but all their products that I've seen or used have been excellent. I have confidence in Dorman products to be as good or sometimes better than stock OEM. I don't know if they have the heavy duty version for hauling loads. If so, buy them.

If Dorman doesn't make what you need, another brand to consider is Crown brand springs. I know Crown makes a heavy duty version for XJ rear springs. Crown is made in China. Most of the Crown products I have purchased were excellent to good, but their bushings are only marginally acceptable. So Crown's quality varies by product, IME. I don't know how good their springs are. However, I do know that several guys at JF recommended Crown springs and claimed good results. So they're probably good. The price is good. Many places sell Crown springs, including Quadratec.com, which is a JF vendor here. If you call Quadratec and tell them you're a JF member, they'lll give you free shipping.

Another option is stock Jeep OEM springs from Rocky-Road.com. Normally stock OEM springs are to expensive, but I have seen Rocky Road selling them on their website for reasonable prices. I don't know if they have the heavy duty version for hauling loads. Email or call them.
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post #6 of 24 Old 02-26-2017, 08:42 PM
Charley3
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You might also want to upgrade your rear shocks to Bilstein 4600 or some of the heavier duty Monroe shocks (but not the self leveling shocks because shock mounts aren't strong enough for that).

Monroe OE Spectrum would probably be ideal for a good compromise of firm enough with reasonable comfort. Monroe Magnum would be firmer. Bilstein 4600 would be firmer.

Shocks can be purchased MUCH cheaper online, if you can install them yourself.

Warning: I often edit my posts a few times to get them complete or correct errors.

Note: I had heart surgery Mar 2016. I wasn't feeling well since, but I improved this Dec 2016. Now I'm feeling better and getting back to Jeeping, modifying and wheeling.
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post #7 of 24 Old 02-27-2017, 04:46 AM
CJ7-Tim
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Add-a-Leaf work well, ( if the stock springs are not completely inverted ) and while firmer than stock, they are not 1 ton truck rattle your teeth harsh. I have built a number of AAL and bastard pack leaf springs for my Jeeps and for members of my local Jeep club.

Adding a stock XJ Cherokee main leaf with the spring eyes trimmed off will firm up a weak spring pack, add about 1" to 1.5" of lift, and only slightly increase the pack stiffness. I have built several AAL and bastard packs for my Cherokees and for members of my local Jeep 4x4 club. They have been an inexpensive and durable method to revive saggy stock leaf springs or to lift anywhere from 1.5" to 4.5" taller than stock.


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post #8 of 24 Old 02-27-2017, 12:47 PM
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Soak the bolts down several times, several days ahead, with PB Blaster.
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post #9 of 24 Old 02-27-2017, 01:22 PM
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Quote:
Originally Posted by AZDeez View Post
So I have a 94 XJ Sport 2wd 4.0 that i use for getting around town with all my tools in the back and have noticed that i am probably overloading the suspension. In fact when I was fully loaded one day my rear spring was flat across. Soooo I went searching the forums for an upgrade not to lift but to increase payload. If this ends up in a slight lift I am sure a little nose down would not be deal killer. I was unable to figure if there is a spring swap from something else or a suggested aftermarket product would help.
Thanks in advance.
Crown or Dorman HD leaf springs. They lift a smidge when the back is empty, 1-1.5", but they match the factory towing leaf specs. Mine rode and sat very well with a lot of weight in the back or with my RV before I lifted. They ride stiff empty, but near factory with weight.

Great solution to broken down factory medium duty leaves if you're hauling a lot of stuff around and the end result will be better than using an AAL on broken down stock packs. That adds a lot of stress to the existing springs and gets stiff as hell to boot.
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post #10 of 24 Old 02-27-2017, 05:21 PM
unit861
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I agree with bluejunior--crown HD SPRINGS are a good inexpensive choice( they've been on my '96 for 10 years now) a bit stiff when empty, but great pulling a camper or hauling firewood.
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post #11 of 24 Old 03-01-2017, 08:13 PM
DannyC1
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Replacing leaf springs is a good idea depending on how much weight you haul.. I put load leveling shocks on mine and they are pretty stiff. You can get them at any parts place. I work at Advance Auto Parts so I went with Monroe load leveling shocks.
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post #12 of 24 Old 03-01-2017, 08:30 PM
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Originally Posted by DannyC1 View Post
Replacing leaf springs is a good idea depending on how much weight you haul.. I put load leveling shocks on mine and they are pretty stiff. You can get them at any parts place. I work at Advance Auto Parts so I went with Monroe load leveling shocks.
I hate to say anything that comes off as bashing a forum member but: the XJ shock mounts and unibody are NOT up to load leveling shocks. It's just not. Without reinforcement the metal fatigue will catch up and they'll eventually fail spectacularly.

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post #13 of 24 Old 03-02-2017, 08:50 AM
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Good to know. I had no idea. I did make a bracket for the top to drop them 3" so they aren't mounted directly to the body. I hope that will help.
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post #14 of 24 Old 03-02-2017, 08:54 AM
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Good to know. I had no idea. I did make a bracket for the top to drop them 3" so they aren't mounted directly to the body. I hope that will help.
Depends on the design and the amount of weight you're asking them to carry I suppose. Just keep an eye on them if you're really beating on them and consider using a helper/load leaf or maybe (and I don't know the name for these, sorry) the extra air helpers that fit from the leaf springs to the frame rails to replace them in the future.

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post #15 of 24 Old 03-02-2017, 02:37 PM
Charley3
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Originally Posted by CJ7-Tim View Post
Add-a-Leaf work well, ( if the stock springs are not completely inverted ) and while firmer than stock, they are not 1 ton truck rattle your teeth harsh.

Really? Hmm. I'm take your work for that. You got way better add-a-leaf results than I did.

My first XJ was a 96 XJ. I had tire store put some brand of add-a-leaf on it. I have no idea what brand. It rode "rattle your teeth out" harsh, even with a heavy aftermarket rear bumper and gas tank skidplate. It was horrible.

Do you know some trick for a good add-a-leaf that I don't know? Are your standards for ride quality very different than mine? I'm not being a smart butt. I'm truly asking. I don't understand how our experiences with add-a-leaf could be so different.

Warning: I often edit my posts a few times to get them complete or correct errors.

Note: I had heart surgery Mar 2016. I wasn't feeling well since, but I improved this Dec 2016. Now I'm feeling better and getting back to Jeeping, modifying and wheeling.
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