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 Screamin Lizard Forums : Off Road Tech : TJ Tech
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Bert-jnkns
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Quote Bert-jnkns Replybullet Topic: Suspension question - Control arms
    Posted: 19 Aug 2008 at 7:25pm
I've got a 97 TJ, bought it bone stock a while back and put a 3.5" lift on it and some 33's.  Also at the same time I added a SYE and a new rear drive shaft.  I'm still getting some vibration at around 40-45mph due to the pinion angle being too low now. 

My question is:  Do I need upper and lower control arms or will lower ones do what I need and allow me to get my pinion angle right?  I'd like to replace them all, but for now I just wanted to see if the lowers would do what I need.  If not, I'll just wait and do them all at the same time.  I'd appreciate any info or advice.
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Slc Adam
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Joined: 26 Mar 2008
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Quote Slc Adam Replybullet Posted: 24 Aug 2008 at 7:02pm
By shorting your lower arms will increase your pinion angle, but will also move the wheel centerline forward. Its best to do both, lengthen the uppers and shrink the lowers.
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