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Rear Drive Shaft/Pinion issues-see attached pics

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Old Apr 4, 2012 | 04:26 PM
  #1  
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Default Rear Drive Shaft/Pinion issues-see attached pics

A little background:

2012 Rubicon 2-DR
OME HD springs/shocks (Front and Rear). I netted about 3" of lift overall, also using TF 1" spacers in front to level bumper and winch sag.
JKS Track bars front and rear w/ JKS adjustable rear sway bar links (stocks relocated to front)
315/75-16 Duratracs on 16x8.5 wheels w/ 4.5 B/S

I've included some shots of my rear D/S and pinion angles:

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First pic is rear DS at TC, second is rear DS at pinion

Next is rear DS angle (about 15-16*) and then rear pinion angle (about 8-9*, iphone angle finder, LOL!)

Last is front DS at TC...(ouch!)

So I have about a 7-8 degree difference. Will adjustable rear UCA's be enough to correct the rear drive line angle and the rear TC output shaft angle?
Also, I'm sitting at about 2-3* on the front axle C's, and she's a little darty but not too bad, I'm more concerned about the front DS angle at the TC

Any opinions or comments would be helpful, thanks!

Last edited by vulcan classic; Apr 4, 2012 at 04:30 PM.
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Old Apr 11, 2012 | 09:58 AM
  #2  
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From: Triad, NC
Default

I guess this topic has been beat to death...no replies :(
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Old Apr 11, 2012 | 10:08 AM
  #3  
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From: Laguna Niguel, CA
Default

Originally Posted by vulcan classic
A little background:

2012 Rubicon 2-DR
OME HD springs/shocks (Front and Rear). I netted about 3" of lift overall, also using TF 1" spacers in front to level bumper and winch sag.
JKS Track bars front and rear w/ JKS adjustable rear sway bar links (stocks relocated to front)
315/75-16 Duratracs on 16x8.5 wheels w/ 4.5 B/S

I've included some shots of my rear D/S and pinion angles:

Attachment 299713

Attachment 299715

Attachment 299716

Attachment 299717

Attachment 299718

First pic is rear DS at TC, second is rear DS at pinion

Next is rear DS angle (about 15-16*) and then rear pinion angle (about 8-9*, iphone angle finder, LOL!)

Last is front DS at TC...(ouch!)

So I have about a 7-8 degree difference. Will adjustable rear UCA's be enough to correct the rear drive line angle and the rear TC output shaft angle?
Also, I'm sitting at about 2-3* on the front axle C's, and she's a little darty but not too bad, I'm more concerned about the front DS angle at the TC

Any opinions or comments would be helpful, thanks!
while adjustable rear upper arms will allow you to eliminate the angle at your pinion and ease the angle at the t-case, you will still have enough of an angle that your cv boot at the t-case will fail prematurely. you will need to be investing in a u-joint style drive shaft sooner than later.
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Old Apr 12, 2012 | 03:36 AM
  #4  
SilverJK12's Avatar
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From: Tulsa, OK
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With stick shafts why should the angle be ?

Stock shouldn't be angles parallel like an aftermarket shaft correct? Also, on the c 2-3. I believe there is a better way to see castor bc that area to what I learned recently is not "machined" and can cause off numbers. I also did it at the c but I was told otherwise recently. Mate someone will chime in. :-)
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Old Apr 12, 2012 | 07:08 AM
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Like Wayalife said you are going to need aftermarket driveshafts. Im not sure if you have adjustable CAs. If you dont you will need at least adjustable lower CAs for the front and adjustable upper CAs for the rear.
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Old Apr 12, 2012 | 08:47 AM
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Starting out with a set of RK front LCA's to dial in my caster, rear UCA's will be next...just empty every pocket!!
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