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Unread 07-29-2013, 08:47 AM   #31
Matt1981CJ7
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In theory simply spring-lifting a CJ shouldn't change caster, assuming the springs have the same eye-to-eye length as factory and you don't change shackle length.

Many of us have used YJ springs for our lifts because they are 2.5" wide in front and provide a better ride. However, the front YJ springs are about 1" longer then CJ springs. Therefore caster angle does change when using these springs.

My 2.5" YJ lift required 4 degree shims to get 7 degrees of caster. It tracks and returns to center beautifully with this setup.

Hope this helps,

Matt

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Unread 08-03-2013, 06:31 AM   #32
robcoon
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update

I have installed the 4 degree shim, and replaced the tie-rod ends. The original tie-rod ends were very worn and not keeping the toe end. While test driving the steering starts to return to center but not all the way. Plan now is to install a 6 degree shim and test again. Will post again after the new shim is installed.
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Unread 08-03-2013, 06:44 AM   #33
skizriz
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Did you ever check the ball joints as suggested? If they are too tight, having 20 degrees of caster won't return the wheels to center.

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Unread 08-03-2013, 05:08 PM   #34
Guy Smilie
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Question: Can you have to much castor? Say you add 6 degree shims and now your at 8 degrees positive caster. Bad or good?
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Unread 08-03-2013, 05:14 PM   #35
LumpyGrits
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YES, you can........That is even worst!
LG
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Unread 08-05-2013, 08:58 PM   #36
robcoon
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solution

Ball Joints are okay. Tie-rod ends are replaced, Toe-in is fixed. 6 degree shim is in place. Final part of the puzzle: Steering box was too tight. Loosened the load on the steering box by 1/2 turn and the jeep centers after a corner. Thanks for all the help.
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Unread 08-05-2013, 09:23 PM   #37
LumpyGrits
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How much free play do you have in the wheel now?
LG
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Unread 08-06-2013, 04:48 AM   #38
Guy Smilie
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Did you or will you have a shop check your settings? Was wondering what your final caster reading is.
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Unread 08-06-2013, 06:28 AM   #39
robcoon
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Final caster is 8.2 degrees. Very little free play in my steering.
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Unread 08-06-2013, 07:47 AM   #40
LumpyGrits
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I would take some out.......
LG
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Unread 08-06-2013, 10:09 AM   #41
robcoon
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I was thinking that also. What does too much caster hurt? The front u-joint?
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Unread 08-06-2013, 10:13 AM   #42
LumpyGrits
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Gives you oversteer.
http://en.wikipedia.org/wiki/Understeer_and_oversteer
LG
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