Default Wonder-ing about steering? 

Old 11-08-2009, 08:55 PM   #1
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I have a 78 CJ7 and when I first got it (2 yrs ago) it would get a little white knuckley on road especially when rough road at 40 mph. And as far as I can tell all it had for lift was 1.75 in shackels and 30 in tires.
I have since put a 4" Rough country lift 33 SS tires 3.75" back spaced
15" x 10" wheels, new power steering boxw/brace,new stabilizer shock, new tie rod w/ends, drag link, u-joints wheel bearings, replaced shackles w/ .75" grease-able's, drop piman arm, etc... and It still gets un-nerving. I havent checked caster got to get my head around how to look at that.
But my question (s) / theroie's are...
Shackles will change caster right and if so the reduction of 1" in shackle sould have improved this right? but maybe not eliminated
And with no sway or track bars, that axle is just sitting on top of those springs on those highly flexable shackles as the axle drifts side to side it will cause steering issues right? Sitting parked and running the springs move before the tires.
is this the nature of the beast? and I just need to man up and Drive! Or is there any ideas out there to make things a little more stable

 

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Default Re: Wonder-ing about steering? 

Old 11-08-2009, 09:17 PM   #2
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Im willing to bet if you get rid of the lift shackles the ride will be much improved. If you need the extra inch or so add a body lift or trim the sheetmetal.
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Default Re: Wonder-ing about steering? 

Old 11-08-2009, 09:34 PM   #3
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No hell I got plenty of room the RC spring gave me almost 7 inches of lift. I'm gonna do that I've never had stock shackles on this jeep am I correct in cl hole to cl hole stock shackles are 4 inch.

 

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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 12:29 PM   #4
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I'll measure and have an answere for you after work around 4pm if no one else chimes in.
Quote:
Originally Posted by tvince View Post
No hell I got plenty of room the RC spring gave me almost 7 inches of lift. I'm gonna do that I've never had stock shackles on this jeep am I correct in cl hole to cl hole stock shackles are 4 inch.
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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 01:21 PM   #5
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stock schackels on my 83 are 3" C to C
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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 05:45 PM   #6
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Pics a little dark but OD is correct with the 3 in. measurement. Aftermarket replacements will be a little longer but better than any long lift shackle.
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shackle-measure.jpg  
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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 07:17 PM   #7
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Quote:
Originally Posted by tvince View Post
I have a 78 CJ7 and when I first got it (2 yrs ago) it would get a little white knuckley on road especially when rough road at 40 mph. And as far as I can tell all it had for lift was 1.75 in shackels and 30 in tires.
I have since put a 4" Rough country lift 33 SS tires 3.75" back spaced
15" x 10" wheels, new power steering boxw/brace,new stabilizer shock, new tie rod w/ends, drag link, u-joints wheel bearings, replaced shackles w/ .75" grease-able's, drop piman arm, etc... and It still gets un-nerving. I havent checked caster got to get my head around how to look at that.
But my question (s) / theroie's are...
Shackles will change caster right and if so the reduction of 1" in shackle sould have improved this right? but maybe not eliminated
And with no sway or track bars, that axle is just sitting on top of those springs on those highly flexable shackles as the axle drifts side to side it will cause steering issues right? Sitting parked and running the springs move before the tires.
is this the nature of the beast? and I just need to man up and Drive! Or is there any ideas out there to make things a little more stable

The shackles on my rig are 1" taller on the front axle 2" taller on the rear.
I'm running 38" tires & no sway bars. My rig tracks straight enough to take your hand off the wheel at freeway speed. I would say you still have some issues. Caster could be part of the problem, but I suspect there is more to it than that. If your axle is moving from side to side. A panard rod should fix that issue.
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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 07:20 PM   #8
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LH, didn't you set your caster custom though?
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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 07:23 PM   #9
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Thanks guys thats quite a bit different than the ones that were on there originally and the ones I got now that are 4.75 I want it a little lower anyway so I'm anxious to try some 3"
Again Thanks alot

 

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Default Re: Wonder-ing about steering? 

Old 11-09-2009, 07:27 PM   #10
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Anything over stock length changes your caster and affects your steering...

Think front wheel on a worn out shopping cart!
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