1990 YJ "Iriwn" - Page 2 - JeepForum.com

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post #16 of 454 Old 01-16-2011, 08:30 PM
ChicoXJ
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1986 XJ Cherokee 
 
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Quote:
Originally Posted by JEEP_Nut1218 View Post
I am going for just a 4" (+-.5) SUA. I dont want to get in to SOA. Do you mean that you would give up corning with SOA or with softer springs? I've heard different things about the track bar.. Anything is better than what it is now so I'll have to experiment a little. Thanks for the info.
Yes, with softer springs you give up cornering. But there is a trade off for a smoother ride and more articulation. Also, one mistake commonly made on SOA is using the top of the housing designed for a bump stop as a spring pad. The reason the springs seem softer with this arrangement is that the spring bends more in the middle that anywhere else. A good kit will have a weld on spring pad that is equal in length to the plate that bolts on with the u bolts. This also takes care of a lot of axle wrap. The track bar is not really necessary on a YJ like it is on the coil spring TJ, at least at slow speeds. What this does is keep you from having bump steer at road speeds and is particularly beneficial for a lifted rig. It does limit articulation however when hooked up. I think one of the slickest things I have seen is a collapsible bar that was from JKS I think. You just undo a bolt and it acts kind of like a shock absorber and then when you are done, you tighten it up. Best of both worlds. But if you are going for a spring under kit, you might want to check out Rubicon Express also. Rustys is cheaper on the retail price, but they really nail you on shipping and handling and more than make it up there. RE also has much better customer service.

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post #17 of 454 Old 01-16-2011, 08:36 PM Thread Starter
JEEP_Nut1218
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1990 YJ Wrangler 
 
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Quote:
Originally Posted by ChicoXJ View Post
Yes, with softer springs you give up cornering. But there is a trade off for a smoother ride and more articulation. Also, one mistake commonly made on SOA is using the top of the housing designed for a bump stop as a spring pad. The reason the springs seem softer with this arrangement is that the spring bends more in the middle that anywhere else. A good kit will have a weld on spring pad that is equal in length to the plate that bolts on with the u bolts. This also takes care of a lot of axle wrap. The track bar is not really necessary on a YJ like it is on the coil spring TJ, at least at slow speeds. What this does is keep you from having bump steer at road speeds and is particularly beneficial for a lifted rig. It does limit articulation however when hooked up. I think one of the slickest things I have seen is a collapsible bar that was from JKS I think. You just undo a bolt and it acts kind of like a shock absorber and then when you are done, you tighten it up. Best of both worlds. But if you are going for a spring under kit, you might want to check out Rubicon Express also. Rustys is cheaper on the retail price, but they really nail you on shipping and handling and more than make it up there. RE also has much better customer service.
Ok I understand. I kno basically what axle wrap is and that it's bad, but not specifically, could you explain? (I'm a n00b). Good to kno about RE/Rusty's. Where did you find the JKS track bar?

'90 YJ with some stuff
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post #18 of 454 Old 01-16-2011, 10:15 PM
ChicoXJ
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Quote:
Originally Posted by JEEP_Nut1218 View Post
Ok I understand. I kno basically what axle wrap is and that it's bad, but not specifically, could you explain? (I'm a n00b). Good to kno about RE/Rusty's. Where did you find the JKS track bar?
Axle wrap is when the axle rotates under power. This changes ujoint angles and is common on leaf spring suspensions. If you already have a steep ujoint angle, like many YJs do anyway in the rear then you can rotate the axle enough under enough power when decelerating in low range to break a ujoint. The lower the spring rate, read softer ride) the more this is possible. One thing you can do and something I think is recommended is a slip yoke eliminator. This allows you to run a CV joint on the tcase end on a drive line that looks like this.



This will allow you to change your drivel line geometry from this



to this



Here is the link for the telescoping track bar

http://store.jksmfg.com/merchant2/me...bar_Components
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post #19 of 454 Old 01-16-2011, 10:40 PM Thread Starter
JEEP_Nut1218
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Alright I get it now. My angle isn't quite that sharp but it's close.. Hopefully I'll be able to get the SYE/CV soon after I get the lift and just deal with the T-case for the time being. Thanks

'90 YJ with some stuff
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post #20 of 454 Old 01-17-2011, 08:59 AM
ms198
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1985 CJ7 
 
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im not sure about rubicon express but if you buy rusty's, you are buying an american product. i don't know about you, but that was a big selling point for me. its an american vehicle, so don't ruin it with cheap chinese products.
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post #21 of 454 Old 01-17-2011, 04:42 PM Thread Starter
JEEP_Nut1218
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Originally Posted by ms198 View Post
im not sure about rubicon express but if you buy rusty's, you are buying an american product. i don't know about you, but that was a big selling point for me. its an american vehicle, so don't ruin it with cheap chinese products.
Alright that's good to kno. I hate all that Chinese s***. Definitely will consider rusty's, thanks

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post #22 of 454 Old 01-17-2011, 05:04 PM Thread Starter
JEEP_Nut1218
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So about spring rates, what would be an ideal number? The Rusty's kit says 165 lbs.

'90 YJ with some stuff
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post #23 of 454 Old 01-17-2011, 07:13 PM
bft89yj
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1989 YJ Wrangler 
 
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Location: beaufort
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never talked to costumer service for re but i did for rustys and i actualy spoke to rusty him self he is there every day if you call and ask for him i have been running with out my track bars for about a week now and havent noticed a difference at all except for added flex i think it is personal opinion and driver style and i love my booms i ordered them from quadratec and i just ordered two sets of currie rears and shipping was a hundred for my lift to sc

not so stock 89 yj on 35s
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post #24 of 454 Old 01-17-2011, 07:36 PM Thread Starter
JEEP_Nut1218
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Originally Posted by bft89yj View Post
never talked to costumer service for re but i did for rustys and i actualy spoke to rusty him self he is there every day if you call and ask for him i have been running with out my track bars for about a week now and havent noticed a difference at all except for added flex i think it is personal opinion and driver style and i love my booms i ordered them from quadratec and i just ordered two sets of currie rears and shipping was a hundred for my lift to sc
Currie rears.. shackles? And yeah I looked at rusty's, they really do get you on shipping but it's still a lot cheaper and skyjacker or RE, which were my top two.

Anybody know about the Spring rates though?

'90 YJ with some stuff
Build
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post #25 of 454 Old 01-18-2011, 05:43 AM
bft89yj
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yeah the rear and front shackles on a yj are exactly the same im running the currie rear shackles both front and rear they are working great it definitely smoothed out the ride a good bit

not so stock 89 yj on 35s
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post #26 of 454 Old 01-18-2011, 06:30 AM Thread Starter
JEEP_Nut1218
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Alright kool. I'll take those into consideration, thanks.

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post #27 of 454 Old 01-18-2011, 08:30 AM
wickedquick2
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1989 YJ Wrangler 
 
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nice sunset. do you ever lay back and look at it?
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post #28 of 454 Old 01-18-2011, 03:11 PM Thread Starter
JEEP_Nut1218
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lol I couldn't figure out wth you were talking about at first but yes i occasionally do

'90 YJ with some stuff
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post #29 of 454 Old 01-18-2011, 04:42 PM
wickedquick2
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so how much offroading do you do? i live right by u and know some good spots that you can go to.
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post #30 of 454 Old 01-18-2011, 07:10 PM Thread Starter
JEEP_Nut1218
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Where do you go to school? I don't go enough, been hesitant because of my suspension and I wouldn't have the money to fix anything if it broke. Where are the spots?

'90 YJ with some stuff
Build
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