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Old 06-20-2007, 08:37 AM   #1
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Drop Pitman arm

I have seen conflicting information on the drop pitman arm, the old school way of thinking was that you really didn't need one until you went to a 4 inch or bigger lift. I own a JK and want to go get a 2 in overall lift. I know that it is not absolutely imperative that I put a new arm on it, but i want to know if i should.

thanks

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Old 06-20-2007, 09:07 AM   #2
coilovers are damn flexy
 
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I do not own a JK, therefore have no first hand knowledge of said. If it were my JK, I would call Joe, at "Absolute Offroad", as he is very knowledgeable, and has a JK, that he has done a lot of mods too. He is a certified mechanic, and an off road enthusiast, as well. He is also a member, and vendor, on this forum. His phone number is also listed on his signature. His opinions, and knowledge, are based on actual hands on experience. That is the best answer I can give you. He is the one that understood your frustration, on your other post.

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Old 06-20-2007, 09:11 AM   #3
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I have full intentions on calling Joe, I was just posting it on here so that others with the same question might get the answer as well.
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Old 06-20-2007, 09:14 AM   #4
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No problem........Once you get the answer, I hope you post it, as well.
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Old 06-21-2007, 04:51 AM   #5
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I think Joe said yes you need one in another thread, but I can't recall at what amount of lift that starts at.
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Old 06-21-2007, 11:23 PM   #6
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Quote:
Originally Posted by bluvikng View Post
I do not own a JK, therefore have no first hand knowledge of said. If it were my JK, I would call Joe, at "Absolute Offroad", as he is very knowledgeable, and has a JK, that he has done a lot of mods too. He is a certified mechanic, and an off road enthusiast, as well. He is also a member, and vendor, on this forum. His phone number is also listed on his signature. His opinions, and knowledge, are based on actual hands on experience. That is the best answer I can give you. He is the one that understood your frustration, on your other post.

Thanks, Axel!! I appreciate the compliment!! But, to answer the question....

YES. If you have a lift kit that changes front trac-bar geometry AT ALL (Bracket OR Arm) Then its absolutly nessecary to run a drop pitman arm. Its 10 times more important when lifting a JK than it was on a TJ. With a TJ you could get away with a little "bumpsteer" and it really was just a little annoyance. BUT with a JK, you have a SAS (Steering angle sensor) It relies on steering wheel position when its reading inputs for the ESP/ERM. If you have a bumpsteer issue, the computer "sees" the steering wheel turn rapidly left then right while the vehicle is still moving forward, it will apply brakes and closes the throttle on you. Its exactly what its SUPPOSED to do, but it does not really know that the jeep is not spinning out of control, its just reading the sensors and putting 2+2 together. I have done 2 Daystar 2" lifts that do not alter the bar/drag link geometry, and had no problems with either ESP or bumpsteer.

Hope this answered your question.


Joe

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