[MacDaddy]

My 04 WJ has the same IRO kit, I replaced all mentioned control arms and upper rear A-arm and ball joint, new sway bar bushing’s without extended end links nor and Addco sway bar and it’s fine. So just check your sway bar bushings any wear will cause it to get a little squirrelly. Did you check your front track bar?

 

[MacDaddy]

Do yourself a big favor also, get the WJ to a shop that can get it off the ground so that all 4 wheels can turn freely so that you can look for a bent axle/hub assembly.
I had a problem with a bent axle from my Daughter sliding into a ditch during a storm and I didn’t find it until I had all 4 wheels off the ground. It gave me a real weird shake at speed and would get loose while rounding a left turn at driving speeds and kept hearing a whomp, whomp, whomp that increased with speed. So while I was replacing the left rear axle shaft I also did carrier bearing/pinion and rear yolk. Good luck and keep me posted.

 

[MacDaddy]

Oh yeah. I already did that also. LOL. This thing sat for almost 3 years. I am doing a ground-up rebuild. One front knuckle, both hubs, both shafts, new wheels and tires, all new ball joints, tie rod ends, control arms, etc. I rebuilt the trans and serviced the transfer case, put on a new valve cover gasket, new power steering pump, and lines, new rear axle shaft bearings and seals on both sides, new brakes all around including the parking shoes. N3 extended shocks, new steering damper, quick disconnect front sway bar links Man-alive... Just the front and rear sway bars and bushings as well as the axle mount front bushings are stock. Hmmm... Would it help to disconnect the rear sway bar until I can get the extended links and new bar??

It could be a bad steering box, “maybe” but since you feel it more in the rear I’d still say the sway bar bushings. I wouldn't Disco the rear sway as it won’t help the issue. Did you put IRO’s Tenneco steering stabilizer on it? That might help diagnose any steering box issues. And did you check the track bar mounting holes to make sure they weren’t oblong from wear?

You do get some handling transfer from front to back for sure but the WJ’s coil overs also produce some “wander”. I guess if you couple the two that would create it for sure. How are your spring perches? I had to replace mine when I did my 04, I’m in NY which just eats vehicles like cheese and pepperoni on a Ritz cracker. I spent about 10k on my rebuild 5years ago and it’s in the back of driveway awaiting another refresh. Keep us posted.

 

[MacDaddy]

I definitely will re-check the track bar adjustment. I am going to get the extended links and new sway bar for the rear, make and install a minimum 1/2" spacer for the rear a-arm, and disconnect and check the steering gear. I didn't feel any slack in it when was replacing the tie rod ends on the drag link, but that doesn't mean much. BTW, I also went stock on all of the control arm parts. At 3" lift, it is the border edge of stock or aftermarket so I stayed with stock. However, the spacer can't hurt and it assuredly needs the new rear sway bar and links. I'm also afraid that if I tell the boss(wife) that I need a new steering gear right now, she'll have me sleeping in my new girlfriend(the one I spend money on). lol

Then do it first, and if she says anything just tell her, I told you about it before...Lol.
So far as the rear sway bar and links I’d def do that and see what happens. And the 3” lift on stock Control Arms is fine, the only issue you might have had was getting the rear upper A Arm Ball joint to seat when you put it together. With that being said it is a stretch and puts a severe angle on the stock set-up.
If you haven't checked it recently the stock one may have shit the bed although it may be relatively new and that would most certainly cause sway. Take a look at that again, and IRO does make a replacement one that takes care of the angle on the rear A Arm and balljoint.

 

[MacDaddy]

Hahaha.. do then ask forgiveness. lol. Yeah, the a-arm needed a bit of coercion to decide that it would cooperate... There is a definite possibility that some part of it shit the bed and needs a replacement. If that is the case, well, I'll fix it and I already have the IRO a-arm in my basket along with the sway bar and links. I hope to see a bit of difference with the spacer that I am making as well. As far as the steering gear goes, It will have to wait a bit, but it is definitely going to receive some attention as well.

Yeah BC said he didn’t have any deathewobble? Just the sway and the rear end kinda diving out on him. Reread all his post’s, see if you can give any input from your view, It’s hard to try and diagnose when we can’t see or feel it. I’m with you on that rear upper A-Arm that will cause the back end to dance a jig if it’s crapped out. Keep us posted, My Friend.

 

[MacDaddy]

Yeah, no death wobble. Anymore. Dancing a painful and uncontrollable jig was the norm. Hehe. But after the installation of the new ball joints and tie rod ends, steering damper, and shocks, thankfully, it has disappeared. With all the new upper and lower control arms, the a-arm, and the upper ball joint, the road walk was considerably better but it is still a major and unsafe issue. I am going to lift check, then lower and re-tighten the a-arm. After that, I'll get the extended links and the upgraded sway bar and go from there. Hopefully, that will correct my problems.

I’ve been all the research and talking to all my Gearheads and we’re all waiting to see what it is, lol.

 

[MacDaddy]

I'm going to upgrade to the Addco bar, as yes, the stock bar is PUNY! Heck. the one on my 75 Monte Carlo was twice that size. I may build my own links. Not sure yet. I got under it today and rechecked all of the mounting hardware. I found one upper a-arm bolt that had loosened a bit so I backed them both out and retorqued them. Nothing loose other than that. That fixed the popping I had heard but nothing else. Onward we go! I will definitely update.

Standing by with great expectation! lol.

 

[MacDaddy]

YYYEEESSSS!!! Addco and RC extended end links for the win! An update on my WJ. I ordered the Addco upgraded 1" anti-sway bar and the RC 11" extended end links and after 3 weeks, they FINALLY arrived today... I spent the last hour and a half installing it all and getting it torqued in. I only had two minor issues. 1. One of the bracket mount bolts on the axle stripped out and I had to rethread the hole. 2. The bolts for the extended links were not the same thread or size as the stock mounting bolts. I had to remove the steel bolt guide from the stock bushings and use two of them in the new RC bushings so that the stock bolts could be used. Thankfully, the OD of the bolt guide was the same for both the old and new ones and only the ID was different. Now all of the "dog chasing a rabbit" road-walk at highway speeds is gone! There is still a bit of bump-steer that I must adjust out or get the adjustable front upper control arms to correct, but it is at least driveable now! Thank you all for the input and Addco suggestion!

Cool, glad it all worked out I’m actually getting ready to hunt down a replacement rear for my 04 as the gear set is toast. I’ve found a couple of junkers so now just gotta convince Momma to let me rebuild it, lol. But seeing as how I just Built my 4Runner TRD Off Road, (I know just shut up I bought for the Locker and because I like’em too) and I’m getting ready to throw some new wheels on her 14’ WK2 it might wait a bit.