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Thread: JBA Front UCA 6.7 Installed

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  1. #1
    Senior Member Getting Dirty thance's Avatar
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    Just had the alignment done by a really nice fellow that was talking with me the whole time. He owns his own shop and also has a 2013 Rubicon Unlimited.

    Anyway, I didn't realize that only the Toe was adjustable on the XK and the Caster and Camber are fixed. Does this sound right to everyone?
    2010 5.7 QTII - OME HD w/ 3/8" spacers up front and F150 MLL in rear, JBA UCA 6.7, JKS 2034 Front Quick Disconnects, Gas Tank Skid Mod, PinchWeld Mod, 1.5" SpiderTrax, General Grabber AT 265/70/17, Custom Front Receiver / Plow Mount, Custom Tow Rings F/R, Diablo Intune.

  2. #2
    Lifetime Member Getting Dirty Matt's Avatar
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    No. The camber and caster are adjusted via the lower control arm mounts.

  3. #3
    Senior Member Getting Dirty thance's Avatar
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    Sounds like I need to take it back tomorrow. Is anything adjustable in the rear?
    2010 5.7 QTII - OME HD w/ 3/8" spacers up front and F150 MLL in rear, JBA UCA 6.7, JKS 2034 Front Quick Disconnects, Gas Tank Skid Mod, PinchWeld Mod, 1.5" SpiderTrax, General Grabber AT 265/70/17, Custom Front Receiver / Plow Mount, Custom Tow Rings F/R, Diablo Intune.

  4. #4
    Lifetime Member Getting Dirty Matt's Avatar
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    Nope, only the front axle. Do you have a printout of your alignment numbers? No need to take it back if they're good.

  5. #5
    Senior Member Getting Dirty thance's Avatar
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    Caster is out, Camber is in:


    Initial Min Spec Max Spec Final
    Front Caster L 2.7 3.55 4.45 2.58
    R 3.38 3.55 4.45 3.33
    Camber L .05 -.70 .15 .04
    R .09 -.70 .15 -.06
    Toe L .26 .00 .25 .12
    R -.24 .00 .25 .12

    Talked to him this morning and he thought the front of the LCA was adjustable, but the rear was just a pivot, so Camber and Caster would be adjusted together...... sounded like he was worried fixing one would hurt the other.
    2010 5.7 QTII - OME HD w/ 3/8" spacers up front and F150 MLL in rear, JBA UCA 6.7, JKS 2034 Front Quick Disconnects, Gas Tank Skid Mod, PinchWeld Mod, 1.5" SpiderTrax, General Grabber AT 265/70/17, Custom Front Receiver / Plow Mount, Custom Tow Rings F/R, Diablo Intune.

  6. #6
    Lifetime Member Getting Dirty Matt's Avatar
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    Numbers dont look too bad so I wouldn't worry. The rear pivot slides to adjust caster and has a minor effect on camber. The front adjusts camber and has a minor effect on caster.

  7. #7
    Senior Member Getting Dirty thance's Avatar
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    Went back today for a second try .... I added a column for the new results:


    Initial Min Spec Max Spec Final 1st try Final 2nd try
    Front Caster L 2.7 3.55 4.45 2.58 3.00
    R 3.38 3.55 4.45 3.33 3.13
    Camber L .05 -.70 .15 .04 -.14
    R .09 -.70 .15 -.06 -.01
    Toe L .26 .00 .25 .12 .11
    R -.24 .00 .25 .12 .12

    Numbers are better, seemed there was only so much that could be done with the caster, without dragging the camber out.
    2010 5.7 QTII - OME HD w/ 3/8" spacers up front and F150 MLL in rear, JBA UCA 6.7, JKS 2034 Front Quick Disconnects, Gas Tank Skid Mod, PinchWeld Mod, 1.5" SpiderTrax, General Grabber AT 265/70/17, Custom Front Receiver / Plow Mount, Custom Tow Rings F/R, Diablo Intune.

  8. #8
    Super Moderator Getting Dirty 07JeepXK's Avatar
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    Umm is your alignment guy familiar with doing alignments on our XK? Doesn't seen it. You should be able to get that alignment dead on
    2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete

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