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Thread: Adjusting Rear Pinion Angle

  1. #1
    Molon Labe Stien's Avatar
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    Default Adjusting Rear Pinion Angle

    Adjusting Rear Pinion Angle
    I have read a lot of threads and articles on how to adjust my rear pinion angle and so far no one is telling me the exact steps to get r done. I have a 03 rubicon with 3.5in of suspension lift and have a Nth Degree Tummy Tucker. Yes I know that is what is throwing bad vibes my direction and yes I have a SYE and a double cardan drive shaft. I also know the rear pinion angle is off and that is what needs adjusting. So I picked up some adjustable upper rear control arms and here is where I need advice. Things seem Simple but there is that "S" word again. I think all i have to do is unbolt the old control arms, jack up my pinion, and install the new control arms and tweek as needed. I think that is the gist of it along with various measuring of angles. All I can find on online is how to measure the angles and what the angles should be (I already know.) Any help would be appreciated.
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    Junior Member devilnutz's Avatar
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    Jack on the diff case just behind the pinion to take the pressure off the upper arms first. then raise the jack until the pinion is pointed at the transfer case and adjust the arns to length. make sure to watch your rear track bare for clearance. you may have to get a new rear track bar bracket to adjust for the angle, JKS makes one. Here's a good write up.
    http://www.stu-offroad.com/axle/pinion/pinion-1.htm

  3. #3
    Molon Labe Stien's Avatar
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    Got it done and I couldnt believe it was that easy... Things are never that easy.
    Life is tough. It is even tougher when you are stupid.
    - John Wayne

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    Senior Member HillBillE's Avatar
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    Quote Originally Posted by Stien View Post
    Got it done and I couldnt believe it was that easy... Things are never that easy.
    You're right, it ain't! Keep an eye on your shocks. On TJ's they tend to hit the coils/coil buckets when you install adjustable UCA's.

    Someone makes a kit for it. Can't recall if it moves the shock mount or coil bucket? But 2 guys in my club have run into that same problem.


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    Junior Member devilnutz's Avatar
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    Good call on the shocks HillBille I for got to mention that one. I forgot the shock brackets when I did this and ended up smashing them on the buckets.

  6. #6
    Wheelin requires wrenchin Doppler's Avatar
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    Quote Originally Posted by HillBillE View Post
    You're right, it ain't! Keep an eye on your shocks. On TJ's they tend to hit the coils/coil buckets when you install adjustable UCA's.

    Someone makes a kit for it. Can't recall if it moves the shock mount or coil bucket? But 2 guys in my club have run into that same problem.
    Teraflex makes a lower shock mount relocating kit, all bolt on.

  7. #7
    Junior Member stangfather's Avatar
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    i haven't done it on a coil spring rear but its just as simple, i had to do it on my K5 with leaves, my jeep doesn't have adj control arms but im also not running a very high lift.

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