5 degrees positive Caster and still no center - Page 3 - JeepForum.com

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post #31 of 42 Old 07-29-2013, 08:47 AM
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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post #32 of 42 Old 08-03-2013, 06:31 AM Thread Starter
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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post #33 of 42 Old 08-03-2013, 06:44 AM
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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78 CJ7.. 258.. TH400/Dana18.. SOA/stock YJ springs.. 35" General Grabbers.. Waggy 44s.. 4.88 gears...Spartan/Lockright...Fiberglass front to rear
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post #34 of 42 Old 08-03-2013, 05:08 PM
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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post #35 of 42 Old 08-03-2013, 05:14 PM
LumpyGrits
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YES, you can........That is even worst!
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post #36 of 42 Old 08-05-2013, 08:58 PM Thread Starter
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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post #37 of 42 Old 08-05-2013, 09:23 PM
LumpyGrits
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How much free play do you have in the wheel now?
LG
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post #38 of 42 Old 08-06-2013, 04:48 AM
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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post #39 of 42 Old 08-06-2013, 06:28 AM Thread Starter
robcoon
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Final caster is 8.2 degrees. Very little free play in my steering.
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post #40 of 42 Old 08-06-2013, 07:47 AM
LumpyGrits
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I would take some out.......
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post #41 of 42 Old 08-06-2013, 10:09 AM Thread Starter
robcoon
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I was thinking that also. What does too much caster hurt? The front u-joint?
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post #42 of 42 Old 08-06-2013, 10:13 AM
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