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View Full Version : How much lift requires a new drive shaft?


ArmyGuy45
04-22-2013, 02:18 PM
I have been reading up about the SYE and people are saying you should upgrade the drive shaft due to length issues. What is the cut off point for using the stock drive shaft?
Mudderoy
04-22-2013, 02:37 PM
I have been reading up about the SYE and people are saying you should upgrade the drive shaft due to length issues. What is the cut off point for using the stock drive shaft?

You have the change the rear drive shaft when you install a SYE. Some people use the hack and tap along with a front drive shaft.
OrangeXJ
04-22-2013, 02:44 PM
I have been reading up about the SYE and people are saying you should upgrade the drive shaft due to length issues. What is the cut off point for using the stock drive shaft?

I was 4.5 with stock shaft with no problems. anything more than that you would probally need a SYE.
ArmyGuy45
04-22-2013, 02:59 PM
I was 4.5 with stock shaft with no problems. anything more than that you would probally need a SYE.

Rustys suggest 3 or more but in your experience you would suggest 4.5?
4.3LXJ
04-22-2013, 03:58 PM
I think this is subjective and depends on year and whose lift you use. The 87 and up seem to be more sensitive to driveline vibes than earlier models. Although I think I can straighten any of them out, but that is the consensus. Many people insist that a 3" lift on your 01 would need an SYE
XJ Wheeler
04-22-2013, 04:21 PM
Do you mean '97 and up, Steve? I've heard that as well. And yes, i agree. Its really circumstantial, based on the vehicle. Some need them at 3", others are fine at 6". Mine personally, i have actual 5.5" lift in the rear and run a 3/4" t-case drop and just very slight vibes when slowing at a certain speed.
4.3LXJ
04-22-2013, 04:32 PM
No, I have an 86. Nothing in this discussion really applies to me because of all the parts replaced, and it is getting worse :D
XJ Wheeler
04-22-2013, 04:36 PM
Oh, okay. I've heard it about the '97+, that's why i thought maybe.
OrangeXJ
04-22-2013, 04:46 PM
Rustys suggest 3 or more but in your experience you would suggest 4.5?

Stock worked fine on my 4.5. keep in mind that Rustys wants to sell you something. Not there is anything wrong with that.
nateyz2000
04-22-2013, 04:53 PM
My 4.5 needed sye
bluedragon436
04-22-2013, 05:16 PM
Depends on if you want to run a TC drop or not... I'm close to 7.5" of lift with just a TC drop and the stock rear shaft... I am planning on ordering a SYE and new shaft though... so I can have the proper setup for the height that I'm at... but I have no wobbles or anything with just a TC drop...
ArmyGuy45
04-23-2013, 06:26 AM
I guess I am trying to ask, if I need a SYE would I need a new drive shaft?
4.3LXJ
04-23-2013, 09:07 AM
Yes if you get an SYE, then you need a new driveshaft. It has a different type of U joint called a double cardan on it.

Here is a link for Tom Woods Drivelines so you can do some research

http://www.4xshaft.com/

Also, look at your front driveshaft. It is the type you will need. You will notice it is different than the rear driveshaft.
ArmyGuy45
04-23-2013, 11:39 AM
Yes if you get an SYE, then you need a new driveshaft. It has a different type of U joint called a double cardan on it.

Here is a link for Tom Woods Drivelines so you can do some research

http://www.4xshaft.com/

Also, look at your front driveshaft. It is the type you will need. You will notice it is different than the rear driveshaft.

Will do, thx