Rough Country 2.5 inch TJ lift kit. - Page 325 - JeepForum.com
 
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post #4861 of 5128 Old 10-03-2011, 11:07 PM
WsRpAoNrGtLtEjR
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Originally Posted by mystangt View Post
Yes and yes.

The rear bracket is a must, the front adj track bar...he CAN get away without it by re-drilling the original mounting point BUT i would advise against it and recommend an adj track bar. You can get an affordable one from rough country for around $100. Or hunt down a used one here on JF.

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Is the rear bracket's only purpose to center the axle? I've been running without one for quite some time now with no issues (I don't care enough about the fact that one side sticks out about half an inch more than the other). Only thing is my rear passenger side tire is wearing unusually on the outer edge of the tread block (looks kinda round-edged), but searched on here and no one can link that to my axle being slightly off center so I have no idea what's causing this.

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post #4862 of 5128 Old 10-05-2011, 04:54 AM
USAFStout88
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Originally Posted by Tannnner View Post
Anyone else have any side pictures of a TJ with 31s on flat ground?


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2004 TJ 2.5 RC spring lift with discos smittybilt xrc front and rear bumpers 10k winch incab control some other goodies


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post #4863 of 5128 Old 10-05-2011, 05:13 PM
AFjeepMan
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Quote:
Originally Posted by WsRpAoNrGtLtEjR

Is the rear bracket's only purpose to center the axle? I've been running without one for quite some time now with no issues (I don't care enough about the fact that one side sticks out about half an inch more than the other). Only thing is my rear passenger side tire is wearing unusually on the outer edge of the tread block (looks kinda round-edged), but searched on here and no one can link that to my axle being slightly off center so I have no idea what's causing this.
If your axle isn't centered it will also be turned slightly...with the passenger side further forward than the drivers side...very slightly! But over time this could cause the wear you speak of, not definite, but possible. it's just a suggested possibility, and I know that 99.9% of people will disagree that it is even possible, but I have seen more long shot things happen!

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WANTED: SYE and cv shaft...good condition and good price. for a TJ with about 5-6" of lift.
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post #4864 of 5128 Old 10-05-2011, 09:27 PM
WsRpAoNrGtLtEjR
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Originally Posted by AFjeepMan View Post
If your axle isn't centered it will also be turned slightly...with the passenger side further forward than the drivers side...very slightly! But over time this could cause the wear you speak of, not definite, but possible. it's just a suggested possibility, and I know that 99.9% of people will disagree that it is even possible, but I have seen more long shot things happen!
This makes sense and is about the only thing that I can think of that would apply to my situation...noticed this after about 3k miles on the tires btw. I've heard some other possibilities, as listed in my related thread http://www.jeepforum.com/forum/f15/u...atrac-1246436/ so maybe trying this inexpensive bracket would help me out...though some folks run w/o a centered axle and don't have this problem.
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post #4865 of 5128 Old 10-06-2011, 08:35 AM
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Quote:
Originally Posted by AFjeepMan View Post
If your axle isn't centered it will also be turned slightly...with the passenger side further forward than the drivers side...very slightly! But over time this could cause the wear you speak of, not definite, but possible. it's just a suggested possibility, and I know that 99.9% of people will disagree that it is even possible, but I have seen more long shot things happen!
Count me among the 99.9%. How does lifting the Jeep move the axle forward? You have 4 control arms that are holding the axle in place. (Which probably isn't perfectly centered from factory) But even if it, did both tires are on the same axle, so you would simply turn the steering wheel slightly to correct this.

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post #4866 of 5128 Old 10-06-2011, 08:07 PM
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Quote:
Originally Posted by Fargo View Post
Count me among the 99.9%. How does lifting the Jeep move the axle forward? You have 4 control arms that are holding the axle in place. (Which probably isn't perfectly centered from factory) But even if it, did both tires are on the same axle, so you would simply turn the steering wheel slightly to correct this.
It will move front and back through the suspensions full range of motion, why do you the driveshaft is designed to lengthen/shorten.

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post #4867 of 5128 Old 10-06-2011, 09:04 PM
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Quote:
Originally Posted by Fargo View Post
Count me among the 99.9%. How does lifting the Jeep move the axle forward? You have 4 control arms that are holding the axle in place. (Which probably isn't perfectly centered from factory) But even if it, did both tires are on the same axle, so you would simply turn the steering wheel slightly to correct this.
If you look at the geometry, he's right. The axle moves to the right as it goes down and, due to the upper arms' angles, the left arm gets shorter while the right gets longer (not really, but you know what I mean). It changes more than just the thrust angle, too. Caster and camber change slightly. But this is a matter of fractions of degrees, so I wouldn't be too concerned about it. I've had my RC 2.5" lift for close to a year and a half and still haven't gotten around to recentering the axles.

Different subject now. I've pulled the front springs out twice now, once when I did the lift initially, once to put in 3/4" spacers to fix sag caused by having 4 banger springs under a 4.0 (wrong kit was shipped), and the springs were a cast iron ill-tempered female both times. I'm hoping to have time and manual labor to swap 'em again tomorrow, but I'd rather not fight the things for 6 hours. Anyone have any suggestions as to how to get them to slide in as they're rumored to do? I'm thinking about unbolting the axle end of the lower control arms. Thoughts?

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post #4868 of 5128 Old 10-07-2011, 05:22 AM
AFjeepMan
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Quote:
Originally Posted by SFT2

If you look at the geometry, he's right. The axle moves to the right as it goes down and, due to the upper arms' angles, the left arm gets shorter while the right gets longer (not really, but you know what I mean). It changes more than just the thrust angle, too. Caster and camber change slightly. But this is a matter of fractions of degrees, so I wouldn't be too concerned about it. I've had my RC 2.5" lift for close to a year and a half and still haven't gotten around to recentering the axles.

Different subject now. I've pulled the front springs out twice now, once when I did the lift initially, once to put in 3/4" spacers to fix sag caused by having 4 banger springs under a 4.0 (wrong kit was shipped), and the springs were a cast iron ill-tempered female both times. I'm hoping to have time and manual labor to swap 'em again tomorrow, but I'd rather not fight the things for 6 hours. Anyone have any suggestions as to how to get them to slide in as they're rumored to do? I'm thinking about unbolting the axle end of the lower control arms. Thoughts?
Spring compressor, strut style, or if you have the ability to, when the jeep is in the air ratchet the axle down to provide more room, but those are long springs for a 2.5" kit, same extended length as the 4" springs so it's a challenge if you don't have flex arms that allow for additional droop with ease. If you find an easier solution let us know

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l----L - OlllllllO-

(o)_) (o)_)--)_)

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WANTED: SYE and cv shaft...good condition and good price. for a TJ with about 5-6" of lift.
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post #4869 of 5128 Old 10-07-2011, 05:22 AM
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Quote:
Originally Posted by Tannnner View Post
Anyone else have any side pictures of a TJ with 31s on flat ground?
Stock:




R.C. 2.5:


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post #4870 of 5128 Old 10-07-2011, 08:07 AM
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Quote:
Originally Posted by SFT2 View Post
Anyone have any suggestions as to how to get them to slide in as they're rumored to do? I'm thinking about unbolting the axle end of the lower control arms. Thoughts?
Spring compressor.


These front springs are not going in without a spring compressor.....especially if you have added bumpstop extensions as you should've.

I have always found with spring compressors, there is no need to disconnect the trackbar. If you leave it connected, install the passenger side first since that is going to be the tightest fit from the start. With the passenger side in first, it will actually help push the driver's side of the axle down to make more room.

If you disconnect the lower control arms to get them in, expect a nice headache getting those reconnected once the springs are in. The springs support the weight of the Jeep; so once the springs are in and you try jacking up the front axle to get the CA holes to line up, the whole Jeep is going to go up....it's not going to bring the axle mounts any closer to the control arms.
I'm not saying there are not ways around that, but expect that issue if you disconnect the control arms.
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post #4871 of 5128 Old 10-07-2011, 04:23 PM
herbiehind
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:since i lifted mine i noticed , since the control arms keep the axles at same distance forward and rearward, the jeep levitates and wont go anywhere . how do i get it back down so it will get traction ?
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post #4872 of 5128 Old 10-19-2011, 03:29 PM
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Quote:
Originally Posted by SFT2 View Post
If you look at the geometry, he's right. The axle moves to the right as it goes down and, due to the upper arms' angles, the left arm gets shorter while the right gets longer (not really, but you know what I mean). It changes more than just the thrust angle, too. Caster and camber change slightly. But this is a matter of fractions of degrees, so I wouldn't be too concerned about it. I've had my RC 2.5" lift for close to a year and a half and still haven't gotten around to recentering the axles.
Do you have issues with unusual wear on any of your tires? I agree that caster and camber are only off very slightly, and to me its not worth the hassle. But I can't help but wonder if this is why I'm getting the strange wear (mentioned in an above post) or if centering my rear axle would change it at all.
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post #4873 of 5128 Old 11-28-2011, 08:32 AM
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I've noticed some sag with mine. Anybody else having that problem?

It's not death wobble unless you're dead.

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post #4874 of 5128 Old 11-28-2011, 08:36 AM
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i'll bet all lifts sag (settle) after a bit .
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post #4875 of 5128 Old 11-28-2011, 08:55 AM
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Quote:
Originally Posted by LJ-ROD View Post
I've noticed some sag with mine. Anybody else having that problem?
The 2.5" progressive springs do sag.I had the RC 3.25" lift and used their 4" springs up front.The 4" springs are much better.

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2.2 performance shocks , 2.5" lift , progressive , rc , rc 2.5 , rcxtreme , rough country

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