lj and SYE question - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > lj and SYE question

SPARTAN LOCKERS are on sale BIG TIME at ROCKRIDGE 4WD!Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineG2 Disc Brake Conversion Kit for Jeep Wrangler YJ TJ LJ Ch

Reply
Unread 08-20-2013, 12:09 AM   #1
danmauro
Registered User
2005 LJ Wrangler 
 
Join Date: Aug 2010
Location: massachusetts, Worcester
Posts: 14
lj and SYE question

So I've had the 3 inch lift on my 05 Lj a little over 4 years now and it is way past time for a change (my front springs are sagging and it makes me sad). I am thinking of dropping some dough and moving up to a 4.5" lift (something with johnny joints all out the wazoo). The question I have come across and can't seem to find a definitive answer to is do I need an SYE with the longer rear drive shaft of the Lj? I do a fair amount of moderate (not a subjective statement at all...) off roading and while the 3 inches of lift have served me fine so far...my cousin just put 4 inches on his 09 Wrangler and now it's taller than mine!

Also if you'll all forgive my ignorance...
The slip yolk itself slides in and out of the Xcase with rear axle movement. Does having the slip yolk eliminator limit the movement of your rear axle because the rear drive line no longer has the ability to "make itself longer"? Is the replacement rear axle kind of one size fits all, or do you have to order based specifically to fit the lift you are doing?

Also I have heard a lot about how an SYE and new rear drive shaft is the way to go simply because it is stronger, and odds are that no matter what I will eventually be putting one on. But I am not exactly made of money so if I get the lift now, I need to save up for the SE later and vice versa which is how the whole "do I really need it?" came up.

danmauro is offline   Reply With Quote
Unread 08-20-2013, 12:24 AM   #2
Knuckelhead
AFSOC Retired
 
Knuckelhead's Avatar
2000 TJ Wrangler 
 
Join Date: Aug 2005
Location: Colorado
Posts: 15,128
Is your LJ a Rubicon?...

DANMAURO'S JEEP
Year & Model
2005 LJ Wrangler
Engine
4.0L
Front Axle
dana 44
Rear Axle
dana 44
Gear Ratio
4:10
Knuckelhead is offline   Reply With Quote
Unread 08-20-2013, 12:27 AM   #3
jaspepp
Registered User
2001 TJ Wrangler 
 
Join Date: Jul 2008
Location: boise, ID
Posts: 368
The SYE simply changes the t-case output to a fixed yoke, which requires a different drive shaft. This allows for a steeper/more proper pinion angle. But if you don't get adjustable control arms you can't adjust you r pinion angle. It turns into a snowball effect real quick at that point. If you don't have vibrations I wouldn't worry too much about it. An LJ is great rig!!!
__________________
"Idaho sucks!!!! Tell California"
jaspepp is offline   Reply With Quote
Unread 08-20-2013, 12:35 AM   #4
danmauro
Registered User
2005 LJ Wrangler 
 
Join Date: Aug 2010
Location: massachusetts, Worcester
Posts: 14
My Lj is not a Rubicon. It came with the 44's stock and I upgraded the gearing.
danmauro is offline   Reply With Quote
Unread 08-20-2013, 12:37 AM   #5
sjones26573
Au revoir, gopher.
 
sjones26573's Avatar
2004 TJ Wrangler 
 
Join Date: Aug 2011
Location: Concord/Harmony/Raleigh, NC
Posts: 9,487
So did you do an axle and gear swap?
__________________
The Yellowtail Build

Quote:
Originally Posted by Jeremy Clarkson - Top Gear Botswana Special
Why don't all cars have no doors? When I come to power I'm going to make it a rule because this is just better.
sjones26573 is online now   Reply With Quote
Unread 08-20-2013, 12:41 AM   #6
Knuckelhead
AFSOC Retired
 
Knuckelhead's Avatar
2000 TJ Wrangler 
 
Join Date: Aug 2005
Location: Colorado
Posts: 15,128
Quote:
Originally Posted by danmauro View Post
My Lj is not a Rubicon. It came with the 44's stock and I upgraded the gearing.
Non Rubicon LJ's don't come stock with front D44 axles, they come with LPd30's...
Knuckelhead is offline   Reply With Quote
Unread 08-20-2013, 12:49 AM   #7
danmauro
Registered User
2005 LJ Wrangler 
 
Join Date: Aug 2010
Location: massachusetts, Worcester
Posts: 14
I don't know what to tell you. I have a dana 44 up front be it from the previous owner or however. But can we focus on the rear end of my jeep as that's what I'm asking about?
danmauro is offline   Reply With Quote
Unread 08-20-2013, 01:01 AM   #8
Knuckelhead
AFSOC Retired
 
Knuckelhead's Avatar
2000 TJ Wrangler 
 
Join Date: Aug 2005
Location: Colorado
Posts: 15,128
Quote:
Originally Posted by danmauro View Post
I don't know what to tell you. I have a dana 44 up front be it from the previous owner or however. But can we focus on the rear end of my jeep as that's what I'm asking about?
If you're going to 4.5" suspension lift, I would think that an SYE, DC driveshaft and adjustable control arms would be a good idea.

The DC driveshaft/SYE would replace the slip yoke and move the slip yoke function to the middle of the driveshaft...
Knuckelhead is offline   Reply With Quote
Unread 08-20-2013, 10:00 AM   #9
joe_jeep
Registered User
2005 LJ Wrangler 
 
Join Date: Mar 2006
Location: hazel park, mi, michigan
Posts: 2,202
4.5" is pushing it on height for an lj without a sye and cvds. im sure its been done, but u might get some vibration.
you should do an sye!
__________________
glfwda #6624
2005 rubicon sahara lj #592
joe_jeep is online now   Reply With Quote
Unread 08-20-2013, 11:04 AM   #10
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 23,306
i think there are some links about this in my sig.
Unlimited04 is offline   Reply With Quote
Unread 08-20-2013, 09:44 PM   #11
danmauro
Registered User
2005 LJ Wrangler 
 
Join Date: Aug 2010
Location: massachusetts, Worcester
Posts: 14
Quote:
Originally Posted by Unlimited04 View Post
i think there are some links about this in my sig.
Thanks, your sig answered pretty much all of my questions.
danmauro is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.