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  1. #1
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    Default Long arm alignment

    I have a 98 XJ with a rough country 6.5" long arm , rear adjustable shackles and soon 1.75" coil spacers, the driver side leans and it seems to dart around ( thinking too much neg caster)
    What is your caster specs?
    Or all of your alignment specs?
    I am thinking the more positive caster the better.
    Plus this friggin lower driver side is driving me nuts. Its like 1.25" lower.ĦĦ


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  2. #2
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    Sep 2009
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    Default Re: Long arm alignment

    Castor should be at 5°
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  3. #3
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    Nov 2013
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    Tucson AZ
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    Default Re: Long arm alignment

    Quote Originally Posted by altonamud View Post
    I have a 98 XJ with a rough country 6.5" long arm , rear adjustable shackles and soon 1.75" coil spacers, the driver side leans and it seems to dart around ( thinking too much neg caster)
    What is your caster specs?
    Or all of your alignment specs?
    I am thinking the more positive caster the better.
    Plus this friggin lower driver side is driving me nuts. Its like 1.25" lower.ĦĦ


    Sent from my iPhone using Tapatalk
    Hi Altonamud, you need to be looking at attachment points/frame issues re your 1.25" of lean. All things being equal, alignment is only a measurement of how your axle is tilted front to rear (caster) and how your wheels are pointed (camber and toe). None of which has anything to do with ride height. I run the RE 6.5 long arm setup and , other than making sure the axle was square, had no issues with the type of problems you are having. Have you checked to make sure spring saddles and springs are in good shape? Could also be something in the rear end...leaf springs don't flex as well as coils so a small difference in the rear may be "pushing" the front suspension.
    If it ain't broke, don't fix it. If it's fixed, go break it!

  4. #4
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    Default Re: Long arm alignment

    Where did u find that info 4.3LXJ?




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  5. #5
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    Oct 2011
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    S.E. Texas
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    Default Re: Long arm alignment

    Quote Originally Posted by altonamud View Post
    Where did u find that info 4.3LXJ?




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    He's a suspension guru.

    Sent via messenger pigeon - i talk, he types.

  6. #6
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    Default Re: Long arm alignment

    Quote Originally Posted by altonamud View Post
    Where did u find that info 4.3LXJ?




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    Alignment specs. But I also have done some talking with a local 4WD shop that was run by an alignment guy. He set them up at 8°. But with taller lifts like mine, you cannot get away with that much without driveline vibes even with the high pinion. So stock specs are probably the best to stay with
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  7. #7
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    Default Re: Long arm alignment

    Thanks you.


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  8. #8
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    Default Re: Long arm alignment

    My buddy thinks the track bar is causing the lean, but i can not see how, when i disconnect the sway bar it makes no difference.
    I did cycle the suspension a bit ;-) maybe it needs more cycling. IDK


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  9. #9
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    Tucson AZ
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    Default Re: Long arm alignment

    Quote Originally Posted by altonamud View Post
    My buddy thinks the track bar is causing the lean, but i can not see how, when i disconnect the sway bar it makes no difference.
    I did cycle the suspension a bit ;-) maybe it needs more cycling. IDK


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    How's your axle sitting in relation to the body? With wheels pointed straight ahead try looking at where each front tire is in relation to it's fender. If it is a track bar issue the driver's side wheel should be much farther outside of the fender. Still, unless it is severe, I can't see why that would cause a lean. Did you try leaving the end of track bar disconnected? You can't drive it like that but if it is causing the lean that would release it and at least you would know. There are a lot of Aftermarket track bars available.
    If it ain't broke, don't fix it. If it's fixed, go break it!

  10. #10
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    Default Re: Long arm alignment

    Side to side the front axle is a bit off to one side , i'd guess around 3/4" .
    Could it be that the spring got damaged when testing/cycling the suspension?
    I will phone rough country and ask them.



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  11. #11
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    Default Re: Long arm alignment

    That is a function of track bar length. It happens every time you lift the front
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  12. #12
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    Default Re: Long arm alignment

    Quote Originally Posted by 4.3LXJ View Post
    That is a function of track bar length. It happens every time you lift the front


    I know what the track bar does , what boggles my mind is the difference of height from left to right


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  13. #13
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    Dec 2013
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    cleveland tx
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    Default Re: Long arm alignment

    the track bar will hold one side down spring wise and 4.3xj knows hiss stuff I ask him all the time when im having truble.....................

  14. #14
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    Default Re: Long arm alignment

    Quote Originally Posted by altonamud View Post
    I know what the track bar does , what boggles my mind is the difference of height from left to right


    Sent from my iPhone using Tapatalk
    Weak spring, it happens
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  15. #15
    Join Date
    Apr 2013
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    Manitoba Canada
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    Default Re: Long arm alignment

    Do you drive your longarm jeep on the hwy at all?
    How does it handle?


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