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Unread 06-02-2013, 03:38 PM   #1
Towny72
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Under Steer

The set up is this.

2.5"suspension lift.
1" body lift
1"lift shackles

31*10.50 tires.

The jeep has a good bit of under steer now. I will give the wheel a good 4-6" of turn before I get much response. When driving at speeds over 45mph this can make things a little tricky. I really want to get this sorted out before I upgrade the lift to a 4" lift and go to 33 or 35s..

Im getting no feed back from the power steering pump, no leaks etc.

Any suggestions?

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Unread 06-03-2013, 05:57 AM   #2
Rproject
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Is this a recent occurrence? Did it start happening after the lift? A few more details please.
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1995 Blue YJ i-4 AX-5 33" Cepek Crushers on 2.5" Rancho lift - SOLD October 2010
1996 White ZJ i-6 auto bone stock
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The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/
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Unread 06-03-2013, 06:29 AM   #3
Anticanman
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You changed the steering geometry. Use a drop pitman arm.

And that's not understeer, that's less than responsive steering. Understeer happens in a corner when the wheels are turned (not just steering wheel) and the vehicle sort of pushes through going straight. Install a spool in the rear and you'll know what understeer is.
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Unread 06-03-2013, 06:46 AM   #4
Rproject
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Should he really need a drop pitman for a 2.5" lift? I'm thinking it's more of a recentering issue with the steering wheel or a loose steering shaft. I had tons of delay until I properly recentered my steering wheel, that's why I'm curious as to when this problem cropped up.
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1995 Blue YJ i-4 AX-5 33" Cepek Crushers on 2.5" Rancho lift - SOLD October 2010
1996 White ZJ i-6 auto bone stock
1987 Maroon YJ i-6 Auto (1.5" body lift. OME 2 1/2" lift. Rancho RS5000 shocks. Rancho steering stabilizer. A-Z Fabrication rock slides. More upgrades coming soon - LOL)


The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/
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Unread 06-03-2013, 10:06 AM   #5
Anticanman
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Quote:
Originally Posted by Rproject View Post
Should he really need a drop pitman for a 2.5" lift? I'm thinking it's more of a recentering issue with the steering wheel or a loose steering shaft. I had tons of delay until I properly recentered my steering wheel, that's why I'm curious as to when this problem cropped up.
I counted 3.5"
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Unread 06-03-2013, 10:36 AM   #6
Towny72
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In all its 3.5" of lift.

The issue has been one that is worsening over time. It did not handle this way after the lift. The lift by the way was done in 05.
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Unread 06-03-2013, 10:42 AM   #7
Randonexplosion
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Just to add, lift shackles are never "good" for steering. It removes the necessary positive caster for steering response. Mine are only 5/8" and I could tell the difference when I installed them. But my rod ends are shot too so my steering is crap on the highway.
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Unread 06-03-2013, 02:11 PM   #8
Rproject
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Quote:
Originally Posted by Anticanman View Post
I counted 3.5"
Missed the 1" shackle part of the lift. for me.



OP, if your steering has gotten worse over time, you'll want to look at all of your steering components, tie rod ends, steering stabilizer, etc to make sure nothing has worn out since '05.
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1995 Blue YJ i-4 AX-5 33" Cepek Crushers on 2.5" Rancho lift - SOLD October 2010
1996 White ZJ i-6 auto bone stock
1987 Maroon YJ i-6 Auto (1.5" body lift. OME 2 1/2" lift. Rancho RS5000 shocks. Rancho steering stabilizer. A-Z Fabrication rock slides. More upgrades coming soon - LOL)


The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/
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Unread 06-03-2013, 02:42 PM   #9
imstillatwork
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In my personal experience, 3/4" shackles and 2.5" OME springs and a stock PA still steers fine. My previous 1" shackles had some bump-steer, but return to center and response was still acceptable.

Like Rporject mentions, if it has been getting worse over time, and was not this bad after than lift was initially installed...I'd be looking at tie rod ends, ball joints, steering wheel shaft (joints and bearings), and look into adjusting the steering box. Probably in that order.

Bad steering angles and geometry will give you consistently poor results, not a slowly worsening situation.
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Unread 06-03-2013, 02:46 PM   #10
Anticanman
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If your steering looks like this:


Time to upgrade.
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Unread 06-06-2013, 01:00 PM   #11
Towny72
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Dang thats some slop.... Well thanks for the pointers. Saturday I going to give all the links components etc a really good looking at. Hopefully I can figure it out or at least narrow it down and report back..
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