newbie lift question

snakester14

Active Member
Joined
Nov 3, 2006
Location
Greenville
so the other day I put my Stock TJ in for a 4 inch suspension lift by rough country. They installed it and called me back and told me I had to order a different drive shaft and a yoke slip eliminater.
I understand that the stock drive shaft didn't fit and I needed a new one but I don't understand the why a yoke slip eliminater was needed and what does it do?
thanks,
Jake
 
snakester14 said:
so the other day I put my Stock TJ in for a 4 inch suspension lift by rough country. They installed it and called me back and told me I had to order a different drive shaft and a yoke slip eliminater.
I understand that the stock drive shaft didn't fit and I needed a new one but I don't understand the why a yoke slip eliminater was needed and what does it do?
thanks,
Jake
Click to expand...


Sounds a bit strange... I know it wouldn't hurt, but not sure if you actually need it... Maybe each jeep requires something different, but my guys didn't see the need for mine right now. I have the rough country X-series lift... and have not ran into any issues yet... *knock on wood*

I do want to change it all up at some point... so if you have the money then why not go ahead and do it...
 
A SYE (Slip Yolk Eliminator) makes it so that the part of the driveshaft that moves (Slip Yolk) is not at the transfer case. This movement is needed to prevent binding on the driveshaft as the rear end moves with suspension articulation. By moving the slip part to the middle of the Driveshaft instead of the transmision tailshaft it allows for a longer driveshaft, and a shallower angle on said drive shaft.


What that means to you is that when you drive down the road your jeep doesn't shake and rattle so much that you think it is falling apart.





PS..... there are a ton of write ups everywhere on the web explaining how,why, and when to do this.


B
 
The good news is DC4wd is running a special on SYE's for 465 right now. :D (Check the vendor specials section on here)
They are pretty easy to install if you want to install it yourself.
(Or for beer/lunch people might come over and help)
Only "special" tool you really need is a set of BIG FAWKING snap ring pliers. :D
 
my question is do i really need the SYE isn't their some ways to go out about stoping the shakeing besides that? Why after the lift was put on does my jeep shake so bad when its only a 4 inch lift and lots of other people have no problem?

oh heres a pic of the drive shaft, yea that is at a pretty steep angle
pictures.html
 
A SYE (Slip Yoke Eliminator [yolk is the yellow stuff in an egg :)] ) is often recommended to keep the transfer case in the factory position - as mentioned above, by shortening the output yoke on the transfer case (xfer case), it accomodates a longer driveshaft which, in turn, has less angle in relation to the pinion yoke on the rear axle. Too much angle and you get vibes or even drieshaft failure.

An alternative is to actually lower the xfer case, bringing the output back closer to the axle input... the problem is that you just lifted your rig, now you are lowering a portion of your rig back closer to the ground, reducing your breakover (stuck-in-the-middle) angle.

SYE is a bit more work, but you get the benefit of retaining the clearance you just gained with the lift.
 
Don't forget adjustable rear upper control arms and a CV bracket for the rear track bar. You will need those things too. This adds to the cost of the SYE.
 
i agree with some of the others in that you transfer case drop would help and an SYE kit is neccessary if you don't won't binding. I am about to order one for my xj. They run usually right around 200 bucks brand new. They might of already dropped your t-case if that kit came with a new cross member. Might want to check that out. Good luck man!
 
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