drive shaft vibrations after install
04-07-2011, 11:12 AM
#11
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what he said. you will need to LENGTHEN you upper control arms and you should do this until your caster is sitting closer to +4°. that will help fix your vibes
04-07-2011, 11:15 AM
#12
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Is this something I can do at home - by myself?
04-07-2011, 11:24 AM
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Sorry, missed that part.
This is what I got from the link though:
From the factory, your caster angle will be set at +4.2° and if you’ve just installed a 3" or taller lift on your Jeep JK Wrangler and are now running 35" tires or bigger, it is recommend that you increase the amount of caster you have to about +6°~7°. More caster will help your Jeep to drive straight, reduce or eliminate any "flightiness" or "dartiness" you might experience and it will even help prevent your ESP from activating.
I have a 3.5" lift with 35" tires, and my caster is at 5.7 - is this not right if I am going off the above statement?
This is what I got from the link though:
From the factory, your caster angle will be set at +4.2° and if you’ve just installed a 3" or taller lift on your Jeep JK Wrangler and are now running 35" tires or bigger, it is recommend that you increase the amount of caster you have to about +6°~7°. More caster will help your Jeep to drive straight, reduce or eliminate any "flightiness" or "dartiness" you might experience and it will even help prevent your ESP from activating.
I have a 3.5" lift with 35" tires, and my caster is at 5.7 - is this not right if I am going off the above statement?
04-07-2011, 11:26 AM
#15
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Double Cardan shafts need different angles. It is a trade-off between good caster and good pinion angles.
Stock Shafts
Double Cardans
Stock Shafts
Double Cardans
Last edited by nthinuf; 04-07-2011 at 11:29 AM.
04-07-2011, 11:27 AM
#16
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Sorry, missed that part.
This is what I got from the link though:
From the factory, your caster angle will be set at +4.2° and if you’ve just installed a 3" or taller lift on your Jeep JK Wrangler and are now running 35" tires or bigger, it is recommend that you increase the amount of caster you have to about +6°~7°. More caster will help your Jeep to drive straight, reduce or eliminate any "flightiness" or "dartiness" you might experience and it will even help prevent your ESP from activating.
I have a 3.5" lift with 35" tires, and my caster is at 5.7 - is this not right if I am going off the above statement?
This is what I got from the link though:
From the factory, your caster angle will be set at +4.2° and if you’ve just installed a 3" or taller lift on your Jeep JK Wrangler and are now running 35" tires or bigger, it is recommend that you increase the amount of caster you have to about +6°~7°. More caster will help your Jeep to drive straight, reduce or eliminate any "flightiness" or "dartiness" you might experience and it will even help prevent your ESP from activating.
I have a 3.5" lift with 35" tires, and my caster is at 5.7 - is this not right if I am going off the above statement?
04-07-2011, 11:45 AM
#17
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Great Info!!! I beleive I'm having the same problem. 
Had the lift done and on the rear they didn't change the CA at all... it was left with just the stock arms with a 4' lift? On the front, they only installed lower adjustable CA's. Does that sound like the correct way to do it?
Had the lift done and on the rear they didn't change the CA at all... it was left with just the stock arms with a 4' lift? On the front, they only installed lower adjustable CA's. Does that sound like the correct way to do it?
04-07-2011, 06:12 PM
#18
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Talked to another shop that specializes in 4x4 vehicles and they are going to hook me up in the morning. Let you guys know the out come and hope setting the caster back to 4.2~4.5 solves the issue.
