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Old 06-26-2009, 09:48 PM
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short control arm lift kit question

Could someone explain the advantage/difference of the aftermarket short control arm versus the stock stamped control arms that come on a TJ? are they longer?
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Old 06-26-2009, 10:02 PM   #2

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The are stronger, as well the adjustable one's allow you to set the pinon angle once you lift it. Also in most cases they will allow for additional flex.

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Old 06-27-2009, 02:19 AM   #3
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Yes they are adjustable for the reasonings Jeepn stated above. When you put taller springs in a TJ with the stock control arms the angle they sit at changes drastically. This affects many things from ride comfort to wheel base. So the adjustable control arms help you bring back some form of the stock suspension geometry.

As far as flex like jeepn was talking about the aftermarket arms (except Teraflex ) mostly use a sperical ball joint like a Johnny Joint or a Heim style set over the stock rubber bushing type joint. This allows for a greater degree of rotation at the axle end hence the added flex.
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Old 06-27-2009, 03:30 AM   #4
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just to add to what the others have said... rubber bushings and flimsy stamped steel make the stock arms really twisty. So the factory arms are actually pretty flexy

they also crack and tear though because they are just stamped steel. sooo, best to get aftermarket ones in the long run if you do alot of off-roading. When I had short arms I only replaced the front lowers with aftermarket so I could adjust their length and correct the caster/geometry and get rid of the bump steer. The other six were all the stock arms. Aftermarket front lower arms also kept my oversized tires from snagging when I turned really sharp. The factory front lower arms are stamped like an "upside down 'U' length-wise and would snag my tires in sharp turns and chew up the inside sidewall lugs.

When I finally did get all the arms replaced, Joe at AO showed them to me and the steel was all cracked and tearing near the bushing ends. I replaced them just in time by the looks of em.

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April 2001 - Sept 2011
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