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Old 08-03-2013, 07:56 AM   #31
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The home made alignment jig is very cool. Thank you guys for the instructions on how to do that in my garage. After a new lift though I did go to an alignment shop. The lift I installed was the RE 3.5" Super flex. It comes with adjustable Upper Control Arms but the bottoms are fixed. My Buddy had the fancy computer aided 4 wheel alignment machine. Both front and rear axles had new adjustable track bars also. He aligned all 4 wheels so both axles were perfectly centered. I know I could have done that at home and I had, I just wanted them dialed in perfectly. What I do not know if it could be caught at home was the thrust angle on the rear axle could was not in spec. Couldn't adjust that with only the upper control arms so I ended up going and buying Currie adjustable lower control arms. Second time around we got thrust angle in spec and all 4 wheels aligned, centered, etc. For the $100 it cost me, (he did not charge me second time around) I can't imagine how much time I would have spent in the garage trying to align all that. Some jobs make sense farming out unless you are going to be doing it repetitively.

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Old 08-03-2013, 11:33 AM   #32
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Jerry that's a great idea. Thanks
How do you know how to set castor or is it caster.
Unless you have a '97 or '98 where the Caster angle is adjustable, neither the Caster angle nor Camber angle is adjustable the way the Jeep leaves the factory. It would require installing adjustable type replacement parts like adjustable length control arms or adjustable ball joints to be able to adjust the Caster & Camber angles.

So when some bring their TJ into an aligment shop, they aren't getting what they think they are... the shop is getting away with setting nothing but the toe-in which is bone-head simple & fast to do. Of course the shop won't mention that.

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Old 08-28-2013, 03:00 PM   #33
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Unless you have a '97 or '98 where the Caster angle is adjustable...
So, if I do have a 98 where it is adjustable, how would one go about adjusting it?

I have DW and want to experiment with some adjustments myself if that is possible without taking it to the shop over and over. I see how I can do that with the toe, but I wanted to see if caster was pretty easy as well, since it is listed as a DW contributor on many of the DW write-ups.

Right now I am running ~29" tires, which someone told me is slightly oversized over factory, and my caster measured around 5 deg when I last had it checked. I thought increasing may help, based on some of the info I have read, to the 6 or 7 deg range.

Thanks in advance if anyone can offer some guidance.
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Old 08-28-2013, 03:33 PM   #34
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So, if I do have a 98 where it is adjustable, how would one go about adjusting it?
.
The LCA's where they mount to the axle you'll see the cam bolts .
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Old 08-28-2013, 07:54 PM   #35
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Just Tires will check your alignment for free.
Then if it needs adjusting they will charge you if you want it fixed.
On mine they checked the tire and axle alignment for free. I see the tire alignment is an easy check but not sure about the axle alignment.

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Old 08-29-2013, 10:48 AM   #36
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So, if I do have a 98 where it is adjustable, how would one go about adjusting it?

I have DW and want to experiment with some adjustments myself if that is possible without taking it to the shop over and over. I see how I can do that with the toe, but I wanted to see if caster was pretty easy as well, since it is listed as a DW contributor on many of the DW write-ups.

Right now I am running ~29" tires, which someone told me is slightly oversized over factory, and my caster measured around 5 deg when I last had it checked. I thought increasing may help, based on some of the info I have read, to the 6 or 7 deg range.

Thanks in advance if anyone can offer some guidance.
5 degrees of caster angle won't cause DW & increasing the caster to the factory 7 degrees likely won't help at all.

I'd be looking at other issues like an imperfectly balanced tire, loose track bar mount, etc.
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Old 08-29-2013, 12:21 PM   #37
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5 degrees of caster angle won't cause DW & increasing the caster to the factory 7 degrees likely won't help at all.

I'd be looking at other issues like an imperfectly balanced tire, loose track bar mount, etc.
Thanks Jerry and T2000J!

I'm trying to take it one step at a time. I had the tires balanced to see if that would help and the tire guys said the tires were really bad. The worst needed 6 oz. on one side to balance it. They put the best two on the front. It helped a little bit, but the wobble starts at about 56 mph, every time, and gets worse as I go faster, so for now, I keep to the right and go my 1 mph over the minimum speed limit for the few miles I go on the expressway here and there.

Trackbar, ball joints, TRE's, and steering box bolts all seem tight. Not sure about the steering box internals - there seems to be some play in there.

I think my next step will be new wheels and tires, but I figured if that didn't work, I would try to play with the caster angle a little bit to see how it changed the feel.

I talked with a former Jeep engineer and he said "go back to stock sizes" and that larger and heavier tires and heavier wheels that I am planning to get are going to probably make it worse...I figure there are plenty of Jeep owners with larger, heavier wheels that don't have DW, so I can figure this out!
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Old 08-29-2013, 12:44 PM   #38
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Tons of great info from Jerry and the guys. As a point of financial reference to the OP:
Local Midas shop charges $149 fora 4 wheel alignment. I think that the quote you received was grossly overpriced.
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Old 08-29-2013, 01:07 PM   #39
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Originally Posted by RustyJeep View Post

I'm trying to take it one step at a time.

I think my next step will be new wheels and tires, !
Jerry is full of great info
As far as tires very good place to start . I could not be leave how Critical they can be with the TJ's when I first got into them .
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Old 08-29-2013, 04:45 PM   #40
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Originally Posted by WredTJ View Post
Tons of great info from Jerry and the guys. As a point of financial reference to the OP:
Local Midas shop charges $149 fora 4 wheel alignment. I think that the quote you received was grossly overpriced.
We only need a 2 wheel no aligning the rear.

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