SYE on the TJ

[matt]

Most people recommend an SYE with 3 inches of lift or more on the Wrangler TJ. Does this have to be done or is the jeep still streetable and wheelable without it? What can be done to make it cheaper?

thanks for the help

[02JeepX]

I have a TJ with a 4" lift, and i havent put a SYE yet, and i havent had too many driveline vibrations. I am thinking about doing that next to the Jeep, but it doesnt need to be put on right away.

[TXsizeK5]

I don't think driveline vibes or streetability would be a matter of have a slipyoke or not. The main thing about a slipyoke is that if your rear driveshaft u-joint breaks your shaft probably will fall out leading to a mess of ATF (in chain driven xfer cases)

After putting on a lift your angles get more severe wearing u-joints faster and possibly pulling the slip yoke out of the xfer case more.

If you're getting driveline vibes you might want to think about going to a double cardon shaft, longer shaft, or dropping the t-case.

Somone correct me if I'm wrong.

[BigRedFord04]

WTF is your avatar Jason???? you as a retarded kid?

[02JeepX]

ha i dunno my friend sent me a pic of this mullet boy and i was a big fan of it http://www.xsunderground.com/thechilde/

[jerryg79]

jesus christ, that is sad, dont click on that link that is really sad, poor kid

[Ben97XJ]

Back to topic. The purpose of a SYE is to allow the use of a CV driveshaft. It also allows the use of a longer driveshaft since you cut off about 4 inches of output shaft. Most newer Jeep transfer cases already have a seal so that you won't leak ATF when the slip yoke comes off. I would reccomend the RE hack and tap its really easy to do if you take it slow. and its only 80 dollars. and a RE shaft is 250. So its relatively cheap. Its good insurance against breaking an output shaft or u-joints when it your slip yoke binds.

[TXsizeK5]

Originally posted by Ben97XJ
Back to topic. The purpose of a SYE is to allow the use of a CV driveshaft. .

You can run a slip yoke double cardon, aka cv shaft, i have one.

[eight]

You have a blazer. He has a jeep. Newish Jeeps need a SYE. Blazers suck.

[jerryg79]

Originally posted by eight
You have a blazer. He has a jeep. Newish Jeeps need a SYE. Blazers suck.

I'm sensing alot of hostility toward blazers lately koldpecker, is this some sort of wierd polish blazer penis envy thing?

[TXsizeK5]

oops, it's a jeep thing... i didn't know

blazers suck eh? well i dont need a SYE to run a double cardon :laughing:

[Matt Conlee]

Ben has you on the right track. The Re kit is very cheap and easy to install without the removable of the output shaft or removing the tcase from the jeep. And yes it will cut down on vibes with a lift of 4 in or greater. I know from experience

[eight]

Originally posted by TXsizeK5
oops, it's a jeep thing... i didn't know

blazers suck eh? well i dont need a SYE to run a double cardon :laughing:

Neither do I. But I don't need a double cardon. :flipoff2:

[stirring up some ****]No hostility towards blazers, I just don't like em, or broncos. Toyotas are good. [/done]

[TXsizeK5]

Originally posted by eight
Neither do I. But I don't need a double cardon. :flipoff2:

[stirring up some ****]No hostility towards blazers, I just don't like em, or broncos. Toyotas are good. [/done]

It's okay, i don't either. haha. :p
After this weekend at clayton i'm gunna try and get my brother to get a jeep or something small like toy or mazda :laughing: so i can build him a nice capable rock/trail rig.

[Ben97XJ]

so i can build him a nice capable rock/trail rig.

You build it? You are joking right!:flipoff2:

[Violentv8toy]

Friend of mine back home has like a 85 K5 blazer on 39" boggers. 60 front/14 year, hydro steering, built 350, all the little extras. It will flat out get it. Gotta love the fullsizes sometimes. Even fullsizes need love somtimes.

[Ben97XJ]

Here is some good info on the SYE-

A SYE kit that shortens the shaft from the lone bearing to the first universal joint will address runout, as well as oscillation. Those are occurring in every tcase of New Process/New Venture origin. The vibration is a side effect.
When you shorten the shaft and add a solid yoke, the driveshaft supplied should be a double cardan design, which adds an extra universal into the equation to relieve driveline angle misalignments that occur when one lifts the vehicle and the axle moves further from the tcase. 15 degees is maxing out the slip yoke design with only two universals to phase. A three inch lift is fast approaching that 15 degrees.

Here is an install writeup- install is the same on XJ and TJs. Me and Matt both run the RE on our rigs.

Writeup (http://jeepsunlimited.com/forums/showthread.php?s=&threadid=368122)

Another install-
Another writeup (http://www.polytropia.com/cherokee/sye.html)