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Unread 06-16-2011, 12:04 PM   #1
rhinocarlos
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SYE absolutley necessary?

I lifted my jeep 3.5 lift with coil springs & 1.5 spacers in the front.
In the back I have a 2" add a leaf more like 1.5 tho, and 2" shekels.

I've been researching an SYE to eliminate the vibrations when the car is cruising and my foot is not on the gas pedal.
I just don't know how to install an SYE or all the parts that I need to buy.

here's some pics of before and after of the Jeep.




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Unread 06-16-2011, 12:13 PM   #2
CJ7-Tim
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Nice looking Cherokee

Everything you need to know is here on the Forum, you just have to search for it a little bit.

Start with this info - http://www.jeepforum.com/forum/f11/t...ks-tsbs-89273/

Drive line vibrations will eventually destroy your Transfer Case or rear axle. Sometimes with a most spectacular self-disassembly.
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Unread 06-16-2011, 12:33 PM   #3
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Originally Posted by CJ7-Tim View Post
Drive line vibrations will eventually destroy your Transfer Case or rear axle. Sometimes with a most spectacular self-disassembly.
Yup, saw a XJ with about 4.5 the other day with just a t-case drop, the rear driveshaft U-joints snapped at the tcase, That had to have been scary for him
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Unread 06-16-2011, 05:07 PM   #4
rhinocarlos
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yeah, I'm definitely getting one, I've decided to do a hack and tap kit with a new drive shaft. I'm not wheeling to hard, and I'm moving a lot closer to school and work, so it should be just fine.
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Unread 06-16-2011, 05:12 PM   #5
1990JEEPXJ
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nothing wrong with a hack n tap. many people use them without a problem.
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Unread 06-16-2011, 05:22 PM   #6
rhinocarlos
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hopefully, but this sure does get expensive and addicting!!
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Unread 06-17-2011, 12:15 AM   #7
1990JEEPXJ
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and the hack n tap is cheaper for you 96+ folks. that with a JY front shaft and you have an SYE for pretty cheap.
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Yea, and I thought it was one of the 11 Commandments:
11) Thou shalt love, cherish, and honor till death, thine square headlights above all other earthy things sayith the Lord.
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Unread 06-17-2011, 04:15 AM   #8
ratmonkey
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You need to shim your axle. an sye would require you to shim it as well.

You don't need a sye sa 3", you do need to shim your axle to get the right pinion angle back.
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Unread 06-17-2011, 09:02 AM   #9
rhinocarlos
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Quote:
Originally Posted by ratmonkey View Post
You need to shim your axle. an sye would require you to shim it as well.

You don't need a sye sa 3", you do need to shim your axle to get the right pinion angle back.
I'm fairly new to my jeep, and have no idea how to shim my axle, Is there a write up on the forum? on how to do it?

Do i need leaf shims? or pinion shims?

Last edited by rhinocarlos; 06-17-2011 at 09:16 AM..
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Unread 06-17-2011, 01:26 PM   #10
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Leaf shims, I bought mine from Rusty's. They are fairly cheap, you just have to put the new pin in the leafs and slip the shims between the axle and springs! I did the hak and tap and it was fairly easy. I would buy the kit with the driveshaft. I think IRO sells it for around 200, that would have been cheaper than piecing it together like I did.
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