Leaf Spring Help - JeepForum.com
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post #1 of 10 Old 10-27-2021, 06:10 PM Thread Starter
davcono
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Leaf Spring Help

I have an 84 CJ7. I am pretty sure the springs are factory. I am running 31s and Bilstein shocks. The Jeep sits nicely, and I do not off-road. Also, I only use a bikini top. My rear springs are sagging on the left side so I would like to replace the rear pair. I count 7 leaves. (6/1?). I'm guessing the Jeep came with a hard top, but I really don't know. I found the chart below on line. I'm guessing the 6/1, 900 lb springs were for a Jeep with a hard top. Just wondering if I go to a 4 leaf, will I get a softer ride without affecting ride height? What would you recommend for replacement springs? Would appreciate any advice.

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post #2 of 10 Old 10-27-2021, 06:44 PM
Hurricane4
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Check here:

https://www.generalspringkc.com/leaf...-dj/1976-1986/

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post #3 of 10 Old 10-27-2021, 09:10 PM
BagusJeep
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You have a Chevy 350 up front, an AX15 trannie, some built axles and little else. That puts you in the category of an I6.

When Jeep turned out your Jeep they used many different springs. A short list to give you an idea:

I4 - Without hardtop - light duty - 4 leaf

I6 - Without hardtop - light duty and Limited Soft Ride - 5 leaf

I6 - With hardtop (and most common on all CJs) - 6 leaf
V8 - Without hardtop - light duty - 6 leaf

All - heavy duty - 7 leaf

All - extra heavy duty - with full wrap on ends - 9 leaf

If I was lightly loaded and looking for a smoothish ride then 5 leafs and toss the heavy duty springs.
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post #4 of 10 Old 10-27-2021, 09:23 PM
bruinjeeper
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even with all the cross referencing, no chart can give you a level ride height due to the fact of the uncontrolled variables (time +usage on your current sets). I would just spring for (pun intended) an entirely new set of 4 to be sure you end up level.
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post #5 of 10 Old 10-28-2021, 08:40 AM Thread Starter
davcono
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Quote:
Originally Posted by Hurricane4 View Post
Let me pose another question. In measuring I am finding about a 1/2 to 3/4 inch drop on the left side. Is it possible that over time there is a bit of a twist in the frame that would account for that and that replacing springs is a waste of time and money?
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post #6 of 10 Old 10-28-2021, 09:07 AM
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Jeep Lean ???

https://www.cj-8.com/threads/jeep-lean-thoughts.50161/

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post #7 of 10 Old 10-28-2021, 09:10 AM
Axhammer
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My All original suspension leans to the left slightly, it is common. I guess there was a recall by AMC years ago, but I’m not familiar with what years it applied to.

I can say this, the flat bracket for the steering stabilizer that goes under the drivers side axle perch, acts as a shim to make the Jeep lean to the drivers side from day one. The recall involved shimming the passenger rear spring perch, so it was just a band aid approach to fixing the problem.

If I was in your shoes, I would replace all fours springs, and make a shim for the passenger front spring perch, and install it during the spring swap. If it still leaned to the drivers side, I would shim the passenger rear perch to fix it, the way AMC did it back in the day.

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post #8 of 10 Old 10-30-2021, 09:44 AM
Feray1948
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When I studied mechanical engineering at university, we had to solve similar problems. This helps me now to understand more about how the car works and what is best for it. I often ordered on https://uk.edubirdie.com diagrams and detailed explanations in the form of essays for papers. I can recommend that you fix this by using the coil pads on the right coil, which has the slackest, or on both of the right coils, for example, 1 inch. To do this, measure the left and right coils from where they are to the frame to find out how much their slope is. Then you can get spacers closer to the amount.

Last edited by Feray1948; 11-02-2021 at 08:00 AM.
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post #9 of 10 Old 10-30-2021, 10:34 AM
Matt1981CJ7
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As the story goes, AMC built hundreds of CJs on frames that were twisted due to improper shipping methods. The result was a noticeable lean to the driver's side, which got labeled as "Jeep Lean".

They issued a recall on it. Their bandaid fix was a 1/2" shim on the rear passenger spring perch, as Axhammer said.

Some guys have gone to the extreme of cutting and re-welding the frame to straighten out their Jeep Lean, but it's a pretty involved repair. Google "Jeep Lean", and you will get more info than you will care to read.

Matt


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post #10 of 10 Old 10-30-2021, 11:57 AM
devildog80
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Get a bigger "Shotgun", and the lean will level out.
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'81 CJ5, 258 I6, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31
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