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Old 02-22-2014, 01:57 PM   #1
YJmuscle's Avatar
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Exclamation Shackles too big?

Is it normal for my leaf springs to be completely straight and not curved at all. I believe the previous owner installed long shackles and didn't change the leaf springs. Could I run into trouble if this is a problem and I do not fix it? Thanks

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Old 02-22-2014, 02:40 PM   #2
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Stock springs are practically flat when under the weight if the Jeep. Stock shackles measure 4 inches from bolt hole to bolt hole. Its recommended to not go over 1 inch lift shackles which would be 6 inches hole to hole.

'93 YJ, 4.0, AX15, Aussie locked D30/open 8.8, 4.10s, 2.5 OME lift, 31s...
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Old 02-22-2014, 02:45 PM   #3
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Welcome to the Forum.
Stock shackles are 4 inches from bolt hole to bolt hole. Anything more than that is aftermarket. If you measure 5 inches, you have 1/2 inch shackle lift. If you measure 6 inches, you have 1 inch shackle lift. Many people disagree on shackle size. Some say 1 inch of lift is the most you should go. If you run too big of a shackle the leafs will eventually sag and your ride quality will suffer, along with many other problems. There are plenty of posts here explaining shackles and there advantages/disadvantages.

1993 Jeep Wrangler 4.0 5-Speed
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Old 02-23-2014, 03:11 PM   #4
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Hole to hole all 4 shackles are 8". My steering is pretty loose. So it sounds like I should go down to the 6" shackles. Should I look for the stocks four-inch or just go down the size to the 6 inch. What are the benefits if any of getting the boomerang Shackles
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Old 02-23-2014, 03:36 PM   #5
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So you have 2" lift shackles (8" hole to hole). Really tall shackle lifts can allow the leafs to move side to side which isn't good at all. If it were me I would go down to a 1" lift (6"total) or less shackle, as long as it didn't cause my tires to rub.

Boomerang shackles can be used to allow the spring to articulate more. They can help prevent spring inversion as well.
"No matter what anyone says, it's YOUR Jeep, do what YOU want"

'95 YJ
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Old 02-23-2014, 05:19 PM   #6
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You can drill holes in your current shackles and just cut off the excess instead of getting new shackles.
92 YJ, 4.0, D44/60, 5" BDS springs rear, SOA front, 1" booms, 1" BL, 35x12.50x15 MTZ's, 4.10 gears. It's never done though.
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Old 02-24-2014, 05:11 PM   #7
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Thanks for the advice. I drilled new holes. Worked out well

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jeep yj , leaf spring , lift , shackles

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