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Thread: WRITE-UP : Basic DIY Jeep JL Wrangler FRONT END ALIGNMENT

  1. #21
    Hooked darrenroos's Avatar
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    Speaking of control arms, when installing adjustable front upper arms, do I need to loosen any bolts on any other bars, rods, axle connections, etc. during the process or do I only need to worry about the bolts securing the upper arms?


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  2. #22
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    Quote Originally Posted by wayoflife View Post
    Setting Your Caster
    If you’ve just installed a 2" lift or taller on your Jeep JL Wrangler, your caster will have changed enough to cause some people to feel a "flighty" or "wandering" sensation when driving at highway speeds. To address this problem, you will need to add more positive caster on your front axle and so that it sits closer to stock again, which is +4°. Of course, being that the JL utilizes an FAD (front axle disconnect) system, even more positive caster can be added and without ill effect. Bringing your caster to about +6° or so will help make your JL's steering feel even tighter.

    The best way to set your caster is to install a set of adjustable front upper and lower control arms. The lowers should be used to reposition your axle under your Jeep and the uppers used to set your caster. If you're on a budget, you can get by with just a set of adjustable front lower arms but, you will need to make sure they can be set long enough to give you what you need. Both methods are covered in this write-up. While cam bolts can be used as a cheap solution to add a bit more positive caster, I would not recommend them.
    @wayoflife do you have a write up on how to reposition the front axle using adjustable lower control arms? Thanks!

  3. #23
    Meme King JTCO's Avatar
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    Quote Originally Posted by x7tristan View Post
    @wayoflife do you have a write up on how to reposition the front axle using adjustable lower control arms? Thanks!
    It just needs to be centered within the wheel well. On a small lift, you shouldn't even have to worry about it. To move the axle forward, lengthen the lower arms. To move it rearward, shorten them.

  4. #24
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    Quote Originally Posted by WJCO View Post
    It just needs to be centered within the wheel well. On a small lift, you shouldn't even have to worry about it. To move the axle forward, lengthen the lower arms. To move it rearward, shorten them.
    Thanks! I'm assuming you would first center the axle with the lower CAs and then adjust castor with the upper CAs?

  5. #25
    Meme King JTCO's Avatar
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    Quote Originally Posted by x7tristan View Post
    Thanks! I'm assuming you would first center the axle with the lower CAs and then adjust castor with the upper CAs?
    By adjusting the upper or the lower, the axle twists/pivots.

    So honestly, it is way easier to just lengthen the lowers to set your caster and not mess with the uppers at all. The amount that the axle moves forward shouldn't affect anything or rubbing.

  6. #26
    Thanks for this write up ! Maybe a silly question but i have to ask ,I've installed 2'' molar lift my self and then took it to the shop and gave them the paperwork that came with the lift and describes how to correct to do the alignment i guess ,,,,
    They did the alignment , the question is - should i be worried?

  7. #27
    Administrator wayoflife's Avatar
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    Quote Originally Posted by AlexJL View Post
    Thanks for this write up ! Maybe a silly question but i have to ask ,I've installed 2'' molar lift my self and then took it to the shop and gave them the paperwork that came with the lift and describes how to correct to do the alignment i guess ,,,,
    They did the alignment , the question is - should i be worried?
    You mean worry that you wasted your money having a guy spend all of 2 minutes re-centering your steering wheel? Yeah, I guess so. If you mean worry that they did something wrong, no. There was nothing on your JL they could have adjusted.

  8. #28
    Resident Smartass OverlanderJL's Avatar
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    Quote Originally Posted by AlexJL View Post
    Thanks for this write up ! Maybe a silly question but i have to ask ,I've installed 2'' molar lift my self and then took it to the shop and gave them the paperwork that came with the lift and describes how to correct to do the alignment i guess ,,,,
    They did the alignment , the question is - should i be worried?
    The fact that you had to give the shop paperwork on how to do an alignment on a Jeep is what would worry me. Why couldn’t you just read it and do it?


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  9. #29

    Great write up! Thanks Eddie.
    VitaMeVas

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