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Why does my pass side coil hit my bumpstop perch?

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Old Feb 4, 2012 | 10:36 AM
  #1  
Drewjharper1900's Avatar
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Default Why does my pass side coil hit my bumpstop perch?

I have a rc series II 3" lift with new lca's. I was putting on my new track bar yesterday and noticed that when the pass side is drooped out, the bumpstop perch hits the coil. But the driver side clears perfectly fine. Does anyone know why is is like this? Would i be okay to just put a shim on the pass side control arm, or should i do both sides? Would that fix my problem and would it affect my caster negativly? Heres some pics

Driver side not flexed and flexed.
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Pass side not flexed and flexed.
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Old Feb 4, 2012 | 11:13 AM
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It is normal for the arms to pull the axle back as they droop due to geometry, but the fact that one side pull further back than the other shows that either one side on the axle isnt dropping as far, or that something needs to be adjusted in your linkage setup (i.e. controls arms, trackbar) Judging by your pictures the passenger side looks to be located further back than the drivers side, shimming/adjusting the passenger side control arms further will probably fix this

Last edited by Bossokee; Feb 4, 2012 at 11:21 AM.
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Old Feb 4, 2012 | 11:38 AM
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Alright. Do you think 1/4" shim would do it?
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Old Feb 4, 2012 | 11:50 AM
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Make sure your axle is centered. Mine rubbed too when it wasn't perfectly straight
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Old Feb 4, 2012 | 01:26 PM
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Well i just went outside and measured and the axle is 1/2" towards the driver side. Sucks because i thought i had it centered yesterday so i took it to the shop and got it aligned and now i have to mess up the alignment to get it centered. :/
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Old Feb 4, 2012 | 01:42 PM
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Originally Posted by Drewjharper1900
Well i just went outside and measured and the axle is 1/2" towards the driver side. Sucks because i thought i had it centered yesterday so i took it to the shop and got it aligned and now i have to mess up the alignment to get it centered. :/
Do it yourself. Not hard at all.
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Old Feb 4, 2012 | 01:49 PM
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I did it myself when i first got the lift because i knew i was getting the track bar a few months later. It just makes me nervous doing it myself because i dont want to ruin my tires. I really just want some new adj uppers and lowers so i can push the axle an inch or two foreward.
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Old Feb 4, 2012 | 03:05 PM
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Just adjust the track bar a little more than 1/2" longer. Because it is at an angle the track bar length and horizontal axle position arent 1:1. If you want it exact you can use Pythagorean theorem to find the right numbers.
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Old Feb 4, 2012 | 03:11 PM
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adjusting track bar will not change alingment...
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Old Feb 4, 2012 | 03:13 PM
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Originally Posted by freegdr
adjusting track bar will not change alingment...
I does affect it to a degree, the drag link must be adjusted with the track bar
* extend the drag link to match your new track bar length an you will not have major changes in alignment
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Old Feb 4, 2012 | 03:16 PM
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Originally Posted by Bossokee
I does affect it to a degree, the drag link must be adjusted with the track bar
* extend the drag link to match your new track bar length an you will not have major changes in alignment
i should of stated caster/camber and toe alingment will not be affected
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Old Feb 4, 2012 | 03:17 PM
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I woukdent have to adjust the tie rod though right?
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Old Feb 4, 2012 | 03:18 PM
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unlock steering wheel adjust track bar then turn drag ilink to recenter steering whell with front tire straight ahead and on the ground...
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Old Feb 4, 2012 | 03:18 PM
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Originally Posted by Drewjharper1900
I woukdent have to adjust the tie rod though right?
correct scroll down to bottomhttp://go.jeep-xj.info/HowtoAlignment.htm
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Old Feb 4, 2012 | 03:22 PM
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Thanks. Ill be adjusting it tomorrow
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