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Old 07-12-2015, 03:45 PM
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Alignment Guru's advice needed

OK as some of you know I have been chasing an alignment issue for a while. I have a 2014 JKU with a 3.5 Metalcloak lift, all 8 adjustable arms. To start things off my toe is correct and there is no damage to any steering components. I have rotated and checked all tires and they are fine also. The steering is tight and there is no bump steer to speak of.

The issue: The jeep pulls slightly to the right. In fact when I let go of the steering wheel the steering wheel actually turns itself about 4 or 5 degrees to the right. So basically I am always having to hold the steering wheel to the left and hold it there to prevent the jeep from drifting to the right. This only happens when I am doing over 10 MPH or so. So it seems to me that maybe there is something binding. (Note a visual of all the joints do not show any binding)

My measurements: I think the answer lies in my measurements. I have taken it for alignment (sorry don't have CASTER numbers) and it appears that their solution to fixing the pull to the right was to to lengthen the passenger side lower control arm, in essence pushing the passenger side of the axle froward. BUT they didn't adjust/lengthen the upper control arm when the lengthened to lower CA. The measurements are thus. PASSENGER SIDE LOWER CA 23 1/2, DRIVER SIDE LOWER CA 23 .... So they pushed the passenger side lower axle 1/2 inch forward to try to prevent the pull. The uppers CA's both PASSENGER AND DRIVER at at 19.

In my mind that would mean the passenger side the bottom was pushed out but the passenger side top is being pulled in since both uppers are the same length on each side, but the passenger lower is longer then the drivers lower. This seems to me like it would be trying to "twist" the upper part of the axle.

So if the passenger lower is 1/2 longer then the drivers lower shouldn't then the passenger upper by 1/2 inch longer then the drivers upper to equal things out?

What do you guys think? Would this cause the steering wheel to turn to the right, thus causing the jeep to pull to the right? Hopefully you get a clear picture of what I am talking about.

As always thanks in advance

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Old 07-12-2015, 05:13 PM   #2
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The front axle is at at a bind like that. I would match the lowers, support the Pinion at +2°. Adjust both upper arms so that the bolts slide easily through the mount holes (no binding) Then take it in and confirm your caster numbers.

If you were to adjust the upper out 1/2 inch the axle would not be square with the frame.

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Old 07-13-2015, 09:56 AM   #3
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What are good alignment numbers per side for a JK Unlimited? Camber, Toe and Caster? Say for a 2.5"-3" lift...

Thanks!
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Old 07-13-2015, 10:39 AM   #4
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Quote:
Originally Posted by mdrums View Post
What are good alignment numbers per side for a JK Unlimited? Camber, Toe and Caster? Say for a 2.5"-3" lift... Thanks!
Camber .06 max i believe
Caster 3.7-4.7
Toe .08 - .10 per side or .16-.20 total
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Old 07-13-2015, 08:59 PM   #5
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Camber .06 max i believe Caster 3.7-4.7 Toe .08 - .10 per side or .16-.20 total
Are these the numbers I am looking for with a teraflex 2.5" lift with front fixed teraflex control arms? It's pulling to the right. Will they adjust for the lift or will they stick with the stock numbers
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Old 07-13-2015, 11:18 PM   #6
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Are these the numbers I am looking for with a teraflex 2.5" lift with front fixed teraflex control arms? It's pulling to the right. Will they adjust for the lift or will they stick with the stock numbers
Lifted or not the specs stay the same.
Castor obviously lowers with lift. The TF arms will put you back to where you want to be.

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