What driveshaft for SYE?? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 05-21-2007, 12:27 PM Thread Starter
 
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What driveshaft for SYE??

I see that most people install a CV style driveshaft along with a SYE conversion. Dad's TJ has a 3.5" RE lift and we are planning the SYE right now but I am unsure as to the necessity of a CV driveshaft. Do we need to get adjustable upper control arms to use a CV shaft? Can we use a standard driveshaft (not CV) after the conversion?

I need to know because he may decide against the conversion for a while if we have to get adjustable arms ($) to make the CV shaft work (I've heard bad things about the cam bolts).

Thanks!!
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post #2 of (permalink) Old 05-21-2007, 12:44 PM
 
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Not to sound ignorant, but what's an SYE? I'm drawing a blank right now on what it could be.
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post #3 of (permalink) Old 05-21-2007, 01:20 PM
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Slip Yoke Eliminator. Montana, you don't need adjustable control arms, but I'm pretty sure you'll have to go with CV driveshaft.
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post #4 of (permalink) Old 05-21-2007, 03:34 PM
 
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Ahh, thanks man.
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post #5 of (permalink) Old 05-22-2007, 09:35 AM Thread Starter
 
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Upalittle, I questioned the adjustable arms because everything I read says you need to point the pinion directly at the transfercase yoke to have the proper alignment for the CV type joints (I haven't had the chance to look lately). Is the pinion usually in the correct alignment already?

This was my main question because we weren't budgeted to buy or make upper control arms.
Thanks again!
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post #6 of (permalink) Old 05-22-2007, 11:34 AM
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If I remember correctly, you can get a standard yoke for the SYE to use a regular driveshaft. Typically the yoke that is included in the kit is a CV type yoke, but I think you can get a standard driveshaft style yoke.

When I did mine, I used an XJ front shaft and had it shortened, but yes, you will need to change the angle of your rear pinion if you do this. Wiht a standard driveshaft, your rear pinion angle would be fine as-is.

Someone like Tom Woods or one of the good driveline suppliers who sell the SYE should be able to answer your questions.

Good luck
Pete

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post #7 of (permalink) Old 05-22-2007, 12:50 PM Thread Starter
 
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I'll check that out with Tom Woods shop, thanks!
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post #8 of (permalink) Old 05-23-2007, 10:29 AM Thread Starter
 
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Called up Tom Woods, and actually talked to Tom Woods (unexpected these days with all the phones being exported to India). My answer was Yes I do need a CV joint on the driveshaft for any lift over 2" on a TJ, and we will need adjustable control arms to point the pinion at the tcase. ds

Another question for you guys:
Can we get by with only adjustable upper or lower control arms or will we need both?
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