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Old 07-02-2012, 08:28 PM   #1
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old man emu leaf spring and greasable shackle installation writeup.

This weekend i finally had the time to install my heavy duty 2.5 inch old man emu leaf springs, u bolts, ome greasable shackles/bushings, and spring to frame bolts. I didnt have the easiest time finding a writeup that answered all my questions. Hopefully this one will help someone else out! The ome stuff did not come with any instruction and left a lot for me to find out by myself! The ome greasable shackle kit is part # -omegs11 shown below
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Old 07-02-2012, 08:40 PM   #2
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The greasable bushings are part number omesb87. This bushing set comes with 3 sets of bushing and a bolt sleeve that is used at the fixed mount that attaches the leaf spring to the frame (the non shackle end). The bushing stamped "pt307" is the set to be used at this mount. The bushing stamped "pt321" is used at the fixed mount to shackle; the one stamped "pt320" is used at the leaf spring to shackle. The zerk fittings (grease nipples) that come with the shackle kit (shown above) should be pointing out! The guys at ome/arb sent me this diagram in the pdf file that shows how to properly put together the shackle.... THERE IS 1 ERROR IN THIS PDF! the illustration at the top right of the pdf says "typical mounting position front or rear"... the illustration is correct for the front shackles only! the rear shackles should be installed upside down from the front with the "anti inversion" pin being on the bottom! make sense? so, anti inversion pin on top for the front shackles and on bottom for the rear shackles!
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Old 07-02-2012, 08:59 PM   #3
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I do not have an impact wrench so decided to douse all nuts and bolts that were to be removed with pb blaster twice a day every day for a week! Seized/rusted bolts are no fun and this is maybe the most important step in order to maintain your sanity!! I do have a milwaukee sawzall and metal cutting blades as well as a 4.5 inch angle grinder incase! below are the bolts (leaf to fixed mount at frame, old shackle bolts, and u bolts) that i soaked with gallons of pb blaster.... *notice the stupid 8 inch inch fang shackles that the previous owner had installed... (these only give a net lift of 2 inches and are ugly and get in the way, hence my switching them out)
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Old 07-02-2012, 09:16 PM   #4
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Ive been dreading breaking these bolts, and busting my knuckles and skull.... To my surprise the bolts on the passenger side front leaf broke free w no problem (god bless pb blaster, its a miracle in a can)...so, everything that i read instructed me to remove the tires and support the frame with jack stands and the axle with a floor jack underneath the differential pumpkin!! I thought... dont the tires and wheels support the axle already? Turns out that they do so i left the tires on!! also made me feel more safe! i decided to do one leaf at a time and used my hi lift under my front bumper to raise the frame off of the axle, the tires were never completely off the ground and it felt extremely stable the whole time! the u bolt bolts were a bit tougher so i easy cut them off with the sawzall.... NOTE: before cutting the u bolts i used your basic scissor jack to support the leaf spring plates and slowly lowered it once all 4 were cut!
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Old 07-02-2012, 09:26 PM   #5
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With the 1st leaf off the old bushings were very easy to remove! everything was going good so far! I greased up the new bushings and attached the Leaf to fixed mount 1st with my new grade 8, 9/16 x 5 inch bolt and lock washers and blue locktite! then i installed the bushings at the shackle end, assembled the shackle and pushed the bolts of the shackle in to the bushings with a big c clamp! NOTE: I decided not to replace the front leaf spring plates so they were attached via the sway bar links during this whole process!
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Old 07-02-2012, 09:43 PM   #6
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Once the leaf was attached at the mount and shackle i had to jack up the front bumber a bit more in order to get the spring plate to the new u bolts. I also used the scissor jack to push up the new leaf spring.
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Old 07-02-2012, 09:52 PM   #7
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The 1st corner was finally complete!! i had to break out the ole trusty angle grinder to cut the fixed mount bolt on the second corner, but that was no problem! here a few before and after pics! im so glad that those stupid 8 inch fangs are gone!!! every thing is much cleaner and just feels tighter! Feel free to ask any questions!
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Old 03-01-2017, 08:21 AM   #8
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Almost 5 years later: thanks for the write-up @beardown - very helpful.

I am about to install this kit this weekend. Coming from a set of M.O.R.E. (Mountain Off Road Enterprises) greasable shackles, I am very impressed with the quality of the OME kit. Don't get me wrong, the M.O.R.E. kit is a very high-quality kit but it is not a perfect fit with the OME springs. Without getting into the details here, after exhaustive research (and test-fitting of both sets of bushings) it became clear that the OME bushings are much more appropriately sized for the OME springs than the semi-generic M.O.R.E. bushings are - the shoulder widths and diameters are different by only millimeters at most, but it makes a big difference. (To anybody interested: if you look carefully at the full OME catalog, they have full specs/dimensions for each part of the springs and widths, which you can compare to the M.O.R.E. bushings. Note that the OME springs are slightly narrower than other, "normal" 2.5"-wide YJ springs.)

How is the kit & bushings holding up 5 years later? How many miles on the set? How is your flex? Have you ever disassembled and re-greased the rear "main eye" spring to frame bushing?
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Old 03-02-2017, 06:52 PM   #9
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I have a page from OME with their suggested torque specs. Pm me if you want them.
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Old 03-02-2017, 08:39 PM   #10
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beardown calls them "8" fangs".

Also known as "death stilts"

Good Luck, L.M.
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12K Badlands winch with dual batteries.
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Old 03-04-2017, 02:07 AM   #11
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Old 03-05-2017, 04:36 PM   #12
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Thanks @Spizz
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Old 03-09-2017, 08:06 AM   #13
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You will probably need a SYE and CV drive shaft if you go with the OEM shackles and 2.5 lift..the shackles are a inch longer than factory...so you end up with a 3.5 lift....I did.
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90' YJ 4.2L 5spd, OME 2.5" Lift w/OME shackles, 1" BL, Clifford 6=8 upgrade kit with Weber 38, HEI, 32 x 11.50 BFG KO2 on Mambas, external slave swap, SWAG tailgate, SYE, sporting a "Woody" DS.
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http://www.wranglerforum.com/f330/an...o-1779242.html
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Old 03-09-2017, 06:34 PM   #14
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I also ended up with about 3.5. I havent driven ot yet as its currently in a spray booth, but I didnt think a SYE was required, although Im not opposed to one either.
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Old 03-09-2017, 06:40 PM   #15
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I got tired of messing with wedges and what not...sye isn't hard to do and eventually going to an 8.8 figured DS uprade was needed anyways..

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90' YJ 4.2L 5spd, OME 2.5" Lift w/OME shackles, 1" BL, Clifford 6=8 upgrade kit with Weber 38, HEI, 32 x 11.50 BFG KO2 on Mambas, external slave swap, SWAG tailgate, SYE, sporting a "Woody" DS.
Emissions/Inspection: NO
http://www.wranglerforum.com/f330/an...o-1779242.html
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