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Best way to boost new rear leaf

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Old 08-06-2014, 08:15 PM
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Default Best way to boost new rear leaf

Hello All,
Just got rid of my inverted rear leaf springs and replaced them with a new set of the Dormans, wow what a difference! It feels like a new truck!

Old leaf spring
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New spring install and a new set of 30.5/9.5/16


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I'm wanting to budget boost it now to 2", maybe 3". Given how saggy the old spring pack is, would it be worth making a bastard pack with them?

Ozzie
Old 08-12-2014, 12:23 AM
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Better off with relocation brackets and longer shackles IMO.
Old 08-12-2014, 07:57 AM
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Originally Posted by Gee oh Dee
Better off with relocation brackets and longer shackles IMO.
I agree for that amount of lift and if you decide that a small amount is needed in the front coils to match the rear spacers are available from 1/2" up.

I used a set Boomerang Shackles for a 1 1/2" of lift on a temp thing waiting on a long arm upgrade for mine. They seem to work fine and do show a little more articulation than a standard set.
Old 08-13-2014, 09:15 PM
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Originally Posted by SetSailMarine
Hello All,
Just got rid of my inverted rear leaf springs and replaced them with a new set of the Dormans, wow what a difference! It feels like a new truck!

Old leaf spring

New spring install and a new set of 30.5/9.5/16

I'm wanting to budget boost it now to 2", maybe 3". Given how saggy the old spring pack is, would it be worth making a bastard pack with them?

Ozzie
do you mind measuring from center cap to bottom of the flare with the new leafs? and have they broken in at all and sagged yet? lastly, what tire size is that? i ask because finding specific onfo on the dormans is difficult
Old 08-14-2014, 07:51 PM
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Thanks for the replies.

Originally Posted by Gee oh Dee
Better off with relocation brackets and longer shackles IMO.
This is a 2wd DD, so that is the reason behind just a BB. So would I need to worry about shackle angles at all? That's the purpose of the relocations brackets, right?
I did get an 1" of lift from the new springs, so I'd be looking for a shackle 1.5"-2".

Originally Posted by JeepaholicNinja
do you mind measuring from center cap to bottom of the flare with the new leafs? and have they broken in at all and sagged yet? lastly, what tire size is that? i ask because finding specific onfo on the dormans is difficult
I measured exactly 18", so I have a 1" boost from the springs, measured about a week after install.
I got these off of Amazon for $100 and free shipping after reading the reviews there. The amount of lift in the reviews was anywhere from nothing to 1"+. I think they had 22 reviews and scored a 4.5 out of 5.
The other Omix (?) leafs were cheaper, $80, but didn't have as many or any reviews, I can't remember.
So far these are great springs, it rides awesome compared to the inverted springs.

The tires are 30.5/9.5/16 and prior to the springs the rubbed pretty good on bumps. Now I have no issues with the rears. They do rub the LCA's on hard over.
I got those off Craigslist for $160 and they look brand new.
Old 08-15-2014, 02:58 PM
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Most extended shackles end up with bad angles, yes, so the relocation brackets are usually mandatory for ride quality and suspension quality/proper function.
Old 08-15-2014, 07:01 PM
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My 01 XJ Sport is bone stock. Ride height was 18" front and 16.5" rear. About two weeks ago I put the Dorman 929-301's in with new shackles and its now 18" all around +/- 1/8" and looks pretty much like the "after" Jeep picture earlier in this thread. No squeaks, clunks, or surprises after install. If your u-joints are old you may want to replace them as they may start acting up with the new ride height. Bottom line - Dorman's restore factory ride height, nothing more, and nothing less, unless you had the UpCountry package which had a little higher ride height than the Dorman's provide.
Old 08-18-2014, 11:11 AM
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Originally Posted by md21722
My 01 XJ Sport is bone stock. Ride height was 18" front and 16.5" rear. About two weeks ago I put the Dorman 929-301's in with new shackles and its now 18" all around +/- 1/8" and looks pretty much like the "after" Jeep picture earlier in this thread. No squeaks, clunks, or surprises after install. If your u-joints are old you may want to replace them as they may start acting up with the new ride height. Bottom line - Dorman's restore factory ride height, nothing more, and nothing less, unless you had the UpCountry package which had a little higher ride height than the Dorman's provide.
I always thought stock was 17 inches rear...It was like half an inch taller in front if I remember correctly. So unless they settle more, they do seem to add lift if you didn't have upcountry....
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