When to Replace Shackles? - JeepForum.com
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post #1 of 9 Old 04-07-2020, 01:46 PM Thread Starter
0hcanada
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When to Replace Shackles?

so, what's the test for needing to replace shackles? or, ... is there one? other than maybe a broken one, what dictates if or when to replace them?

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post #2 of 9 Old 04-07-2020, 02:00 PM
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If they are stock shackles, you’ll see the bolt no longer centered in the bushing.
Sometimes the outer exposed bushing edges will be missing large pieces.
Or the shackle will be loose or leaning from a rusted out or damaged inner sleeve.
Also remember that the design and specs are different between the OEM shackle design and the aftermarket HD versions.

Ed
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post #3 of 9 Old 04-07-2020, 03:32 PM Thread Starter
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Quote:
Originally Posted by only in a jeep cj View Post
If they are stock shackles, youíll see the bolt no longer centered in the bushing.
Sometimes the outer exposed bushing edges will be missing large pieces.
Or the shackle will be loose or leaning from a rusted out or damaged inner sleeve.
Also remember that the design and specs are different between the OEM shackle design and the aftermarket HD versions.
they are stock. ... some outer exposed bushing edges are missing; but still appear centred ... can't say they are leaning either ...

you say that design and specs are different between OEM and aftermarket HD versions. does that mean = better?, or?

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post #4 of 9 Old 04-07-2020, 03:56 PM
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Broken or to upgrade is the only reason to replace a shackle, they are not really a wear item if they are setup and maintained correctly. Now it is a maintenance item to replace the bushings when they get hard, cracked and worn. Most go to an aftermarket shackle to gain some cheap lift over stock. Small lift is ok, but too much and you screw up your steering angles. HD can mean better as you can get a set with greaseable bushings that will ride smoother and last longer.

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post #5 of 9 Old 04-08-2020, 05:21 AM
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Bent shackle
damaged shackle
Center (bushing) bolt loose/rotating in the shackle or bent. These should be fixed on one side and shouldered tight up against the other.

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post #6 of 9 Old 04-08-2020, 07:46 AM
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Like was said, the shackle isn't really a wear item the bushings are. Especially if they are the factory rubber ones. The more notorious weak item is the shackle mounts. They can twist, unwind, or crack at the rivet hole. And if you do go with a longer, beefier aftermarket shackle the need for new mounts becomes even greater.

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post #7 of 9 Old 04-08-2020, 11:24 AM Thread Starter
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so, by looks of responses its basically the bushings that appear in need of replacing. as i replied earlier shackles are straight, centred, ... only thing is some outer exposed (stock) bushing edges are missing.

can you get just bushings, or do you have to buy the entire shackle to get bushings?

if you can get just bushings, any heads up on what's best to keep it stock/OEM?

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post #8 of 9 Old 04-08-2020, 11:50 AM
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you can order stock rubber bushings through 4wd. if you want to stay stock, might as well just replace shackle and all as they normally to not come apart easily.


https://www.4wd.com/p/crown-automoti...ckle-kits/4181
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post #9 of 9 Old 04-08-2020, 05:16 PM
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Quote:
Originally Posted by 0hcanada View Post

you say that design and specs are different between OEM and aftermarket HD versions. does that mean =better?, or?
A lot of people do not understand the design of the stock shackle as it is composed of inner sleeves that are a distance slightly shorter than the width of the bushings so when everything is tightened it compresses the bushings with a certain amount of preload. Yes, the stock bushings are supposed to have their bolts tightened. There should be no metal on metal movement in the OEM set up. Only the rubber bushing is what gives.

The aftermarket heavy duty shackle kits usually consist of a center bar that is welded between the left and right shackle plates. This fixed distance will not allow you to properly preload the bushings and these aftermarket shackles run a larger bolt with no inner sleeve so there is either direct rotation in the bushing or the bolt pivots in the shackle plate holes. They are great for off-road applications were you need a strong but very loose shackle. But for a jeep driven on the highway I will take a stock shackle with either the rubber or the aftermarket polyurethane bushings any day. If you do go with aftermarket polyurethane bushings, be aware that there are two types. The ones with the flat face Are used with the aftermarket shackles, while the ones with a convex face are used with the OEM shackles as those plates have convexed areas.

Ed
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