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Unread 07-18-2010, 10:10 PM   #1
jhf56
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SYE kit for Rubicon?

I am getting the 3.5" standard Rubicon Express lift kit and i was wondering if i have to do a SYE kit. I heard that since i have a Rubicon i dont have to, i dont want to have any vibrations.

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Unread 07-18-2010, 10:11 PM   #2
red88MJ
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the rubi already has a fixed yoke on the 241 tcase so no you dont need a sye
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Unread 07-18-2010, 10:13 PM   #3
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Originally Posted by jhf56 View Post
I am getting the 3.5" standard Rubicon Express lift kit and i was wondering if i have to do a SYE kit. I heard that since i have a Rubicon i dont have to, i dont want to have any vibrations.
Rubis have a fixed yoke so no "Slip Yoke Eliminator".

I bought a 4" lift for our Rubicon and used a 1" T-case drop. You should be fine with the drop.
If you dont want to put the t-case spacer in, be prepared to buy a new rear driveshaft, just in case.

Where in NJ are you?
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Unread 07-18-2010, 10:16 PM   #4
242TJ
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It is possible to get vibrations and wear out u-joints with a Rubicon. Even though it has a fixed yoke, the stock shaft is not a double cardan. Only a problem with massive lifts though. With a 3.5" lift I don't think you will have any problems.
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Unread 07-18-2010, 10:24 PM   #5
jhf56
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Im in Paramus, any recomendations of which t-case drop kit to get?
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Unread 07-18-2010, 10:29 PM   #6
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As answered above, no, no sye. You will likely have vibs with the 3.5" kit (closer to 4-4.5"). Don't waste your money on a t-case drop kit. Just use washers and the appropriate length bolts will the vibs go away. That way you aren't dropping it any more than necessary.
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Unread 07-19-2010, 02:32 AM   #7
RogueSpear2023
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As others have said you don't need a SYE, but you may want to look into a CV drive shaft, like one from Tom Wood, that is made for the Rubicon 1330 u-joints to avoid any vibrations. And yes you can get vibrations with a 3.5" lift, even from shorter lifts in fact. If you got a CV drive shaft, then you would not need a t-case drop.
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Unread 07-19-2010, 06:45 AM   #8
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Your RE kit should come with a T-case drop kit. My SF kit did, but I didn't use it. I think I still have it lying around.
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Unread 07-19-2010, 11:01 AM   #9
jhf56
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how bad do u guys think the vibs will be, because a cv drive shaft is pretty expensive, and i dont have the extra money for that.
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Unread 07-19-2010, 11:24 AM   #10
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Originally Posted by jhf56 View Post
how bad do u guys think the vibs will be, because a cv drive shaft is pretty expensive, and i dont have the extra money for that.
then don't lift the Jeep. its not a matter of "how bad" the vibes will be...any driveline vibes are bad and destroy the u-joints, bearings, seals, etc.

read: http://www.jeepforum.com/forum/f9/wh...nt-one-854790/
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Unread 07-19-2010, 11:27 AM   #11
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Exactly. ANY vibe is bad and will destroy parts faster than you can replace them. I can guarantee that the double cardan shaft (and adj. control arms needed to adjust pinion angle) will be cheaper in the long run than running around for a year with minor vibes.
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Unread 07-19-2010, 12:42 PM   #12
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Originally Posted by Unlimited04 View Post
then don't lift the Jeep. its not a matter of "how bad" the vibes will be...any driveline vibes are bad and destroy the u-joints, bearings, seals, etc.

read: http://www.jeepforum.com/forum/f9/wh...nt-one-854790/
Option 2.) Lift the Jeep, remove the rear driveshaft then put it in 4HI. Now you have a lifted front wheel drive...
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