Suspension/Body/shackle combo question - JeepForum.com

 
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post #1 of 10 Old 07-11-2013, 09:24 PM Thread Starter
jjs89yj
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1989 YJ Wrangler 
 
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Suspension/Body/shackle combo question

Hey Guys- I have a 3 inch suspension lift with a one inch body lift on the jeep now, but am in the process of a frame-off rust fix (build thread to come) and need to replace my shackles. I want to add boomerangs (will probably go with BERSRK).. Can I use boomerang shackles that provide a 1/2" of lift without affecting geometries or the need for a SYE?
Thanks- JS


1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
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post #2 of 10 Old 07-11-2013, 09:41 PM
rogerv
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The set up you want to run is really close to what I have. After installing the booms, I had to play with the trq on the bolts a little bit. Additionally, my steering needed to be tweaked with some small shims to correct my caster( felt a little loose going down the road).
There are some that have no troubles at all, this is just my experience.

If it's not broke- modify it, so it won't break
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post #3 of 10 Old 07-11-2013, 10:30 PM
cojab
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How are you using your Jeep? The shackles will cause some geometry issues but at 1/2" they should be reasonable. I know they are on mine. The SYE is recommended at about
4" of lift. Your right there. With that much lift you might be needing the CV shaft to help control vibrations and moving the slip yoke to the shaft instead of it coming out of the transfer case is a good thing. I'd be looking at getting the SYE.
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post #4 of 10 Old 07-11-2013, 11:18 PM Thread Starter
jjs89yj
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its in pieces right now, but i'd like to build it to have tolerable road manners and be a mildly capable weekend trail rig. i was thinking if I could get an additional 1/2" of clearance for minimal cost it might be worth it, but it sounds like I should hold off and wait until SYE is in the cards. Thanks fellas.

1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
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post #5 of 10 Old 07-12-2013, 06:07 AM
Siva283
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1/2" shackles will not change much. You will be in SYE territory though. You already are to be honest. If you have good flex you could already be risking dropping the driveshaft.

1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

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. It started with a $200 axle, and a few thousand dollars later I was done :)
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diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

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this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #6 of 10 Old 07-12-2013, 08:03 AM
cojab
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Quote:
Originally Posted by Siva283 View Post
You will be in SYE territory though. You already are to be honest. If you have good flex you could already be risking dropping the driveshaft.
Exactly
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post #7 of 10 Old 07-12-2013, 08:07 AM
Anticanman
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Slip yoke eliminator is always a good idea. Everytime you add or remove a suspension component its like playing jenga sometimes they come out like they were meant to be removed and sometimes you end up just walking away from a disaster.

Luck Favours The Prepared
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post #8 of 10 Old 07-12-2013, 09:48 AM
Michaelgoesrawr
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Quote:
Originally Posted by Anticanman
Slip yoke eliminator is always a good idea. Everytime you add or remove a suspension component its like playing jenga: sometimes they come out like they were meant to be removed and sometimes you end up just walking away from a disaster.
Best example of a YJ build I have ever heard *golf claps*

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post #9 of 10 Old 07-12-2013, 11:14 AM
mrdeath2000
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spring lifts dont really change your pinion angle, they just put you closer and closer to the u-joints binding because the shaft is so steep.

when you add longer shackles you are rotating the rear spring forward some and pointing the pinion yoke up more, which is good for SYE, not for stock shaft.

You can get some shackles cheap and try it out, but be prepared to go SYE or swap the stockers back. Test this before you go splurging on bigger tires, etc.

Degree shims are still an option to point it back down, but that's just digging deeper.

93' YJ 2.5L, 4.88's, 8.8, E-Locker & LSD
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post #10 of 10 Old 07-12-2013, 10:32 PM Thread Starter
jjs89yj
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Thanks for the information guys. Looks like I'll be working in a SYE with the rebuild.

1989 YJ: 2.5, ax5, 4" lift, 33" MTs
In the middle of a frame-off-- build thread to come
Parts in waiting: 1" bl, new tank, corbeau xrs seats, family-style roll bar swap, and whatever odds and ends need tending to.
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