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Old 02-26-2008, 03:57 PM   #1
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sye and noncv driveshaft

my jeep has a 2in bb and a t-case drop kit. i want to do a super short sye my question is why do i need to get a cv driveshaft for 400 dollors when i can take one of the cj5 driveshafts i have kicking around and have it retubed. i mean i drove the thing lifted with no drop kit the drive shaft was at 17degrees after the drop kit driveshaft is now 11 degrees. it went fine before and after a short sye the angle will change to even less. someone give me a real answer please. thanks

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Old 02-26-2008, 04:08 PM   #2
I got nothin'

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Did you install the drop kit to get rid of vibrations, or just because it came with the 2"bb? You may be able to lose the t-case drop and not have vibrations result, but only one way to find out.

If you install a SYE kit in you Jeep, you need a driveshaft with the slip joint in it to prevent destroying the output on your transfer case. I don't see any reason that you can use a more traditional u-joint style driveshaft instead of the CV-type driveshaft though. The only way to find out would be to bolt it up and see if you get vibrations. You just need to make sure that you have the angles all right, and you should be okay, but you never know. If you install a CV shaft (and $400 sounds high to me) and have adjustable rear control arms, you will be able to get rid of any vibrations that you have.

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Old 02-26-2008, 04:35 PM   #3
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i got the jeep with the lift already in there i did the drop kit to eliminate the vibs which it did an amazing job of btw. i know i need a slip driveshaft i have a couple (noncv shafts) from a cj5 that had a d300 in it. so you sort of agree that i dont need a cv driveshaft. thanks
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Old 02-26-2008, 04:36 PM   #4
Knows a couple things...

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Why pay extra for a super-short SYE unless you need it? First, you absolutely do not need a super-short SYE for your TJ with only a 2" lift. Heck the standard length SYE is fine even up to at least 5.5" which is what my TJ was at.

Why not go with a super-short if it's available? Because with a super-short SYE kit, you lose the ability to easily recalibrate your speedometer after changing tire size or axle ratio. With the super-short, you can no longer recalibrate your speedometer for $15 by just snapping in a new speedometer gear, you have to buy an expensive aftermarket speedometer calibration circuit like the TruSpeed which costs around $200.

For only 2", even 4-5", you simply do not need the benefits a super-short SYE kit gives. If you want a SYE kit, just go for a standard SYE kit and save some $$$... and save the ability to easily recalibrate your speedometer like you have now.
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Old 02-26-2008, 06:20 PM   #5
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I just did mines.. sye with a tom woods shaft.. I love it just because of no vibes.

from what I understand, the shaft gives you more angle. the stock shaft slips in and out of the t-case shaft.. the double jointed shaft slips in and out of itself. just get it you wont regret it if you have vibes.. I am broke and jobless and I charged it.. heck I cant even buy 200 dollar steelies but I felt the SYE is a must with a lift.
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Old 02-26-2008, 07:48 PM   #6
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Old 02-26-2008, 09:54 PM   #7
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thanks to all of you i got some answers that i can use. thanks jerry for the explanation of ss sye. what im trying to do is build my jeep from the core out

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