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Sways Back And Forth @ 50 mph

Old Dec 27, 2021 | 10:35 PM
  #1  
dorrisant's Avatar
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From: Evansville, IN
Year: 1996
Model: Grand Cherokee (ZJ)
Engine: 5.2l
Default Sways Back And Forth @ 50 mph

1996 ZJ Orvis 175,000
All New CAs w/New Bushings
New Tie Rods and Ends
New Damper
New Drag Link and Ends
New Front Sway Bar Links
New A-Arm Bushings
New Hubs and Rotors
Rocky Road 3 1/2" Lift Kit - Adjustable Track Bar, OME Front Springs, F to R, Rear Track Bar Drop Bracket, T-Case Drop Kit
Running 255-75R17s
I think one of the T-Case cross-member bolts may have pulled out the nutsert, drivers side rear.
Rear sway bar links are disconnected.
There are probably other things that I replaced as well, just can't think of them at the moment.

I did most of this to get rid of Death Wobble and it did. This thing drives rather well, although it seems top-heavy and seems to pitch a bit to far when turning sharply. I'm not to sure that this behavior isn't just the nature of the beast. I can run at 85 and have no issues with no steering issues whatsoever. I have been running this setup for about 10k now. The issue I'm having is that the rear end seems to want to wander back and forth from about 50 mph and up. Doesn't get a lot worse with increased speed... just seems to want to fishtail ever so slightly. Like I'm pulling a single axle trailer. Requires steering input back and forth to correct it, keep it in the lane. It is not too dangerous but could be in heavy traffic. Mostly it is annoying and I know that with all of the problems it had before, this was not one of them.

My questions are, would it be better to reconnect the sway bar in the back?

And would the cross-member nutsert being loose cause this?

Maybe a combo of the two? Just wondering if anyone else had theirs close like this and change the things I'm questioning...

Maybe someone has seen this issue and can share what fixed it.

Thanks for reading!

Last edited by dorrisant; Dec 30, 2021 at 12:37 PM.
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Old May 6, 2022 | 06:48 AM
  #2  
Ricthewrench's Avatar
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From: Ortonville, mi
Year: 97
Model: Cherokee (XJ)
Engine: 4.0
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Reconnect rear sway, see if that does it. Springs/ shox in good shape?
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Old May 6, 2022 | 11:29 AM
  #3  
dorrisant's Avatar
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From: Evansville, IN
Year: 1996
Model: Grand Cherokee (ZJ)
Engine: 5.2l
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Originally Posted by Ricthewrench
Reconnect rear sway, see if that does it. Springs/ shox in good shape?
Brand new shocks. Front to rear spring swap. New OME springs for the front. Old springs were in great shape.
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Old May 6, 2022 | 12:31 PM
  #4  
4.3L XJ's Avatar
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From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
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Did you get an alignment? Sounds like you might be towed in
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Old May 6, 2022 | 12:59 PM
  #5  
dorrisant's Avatar
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From: Evansville, IN
Year: 1996
Model: Grand Cherokee (ZJ)
Engine: 5.2l
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I had it aligned... Will have it done again soon. More work to do soon... new u joints and related 1st
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Old May 6, 2022 | 04:53 PM
  #6  
4.3L XJ's Avatar
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From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
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Well, then it is time to address that sway bar
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Old Sep 7, 2022 | 05:20 PM
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From: Hainsville, NJ
Model: Grand Cherokee
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did you replace the rear trailing arms, or at least the trailing arm bushings. Rear axle sway is generally caused by excessive play in those bushings
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Old Sep 7, 2022 | 06:11 PM
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dorrisant's Avatar
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From: Evansville, IN
Year: 1996
Model: Grand Cherokee (ZJ)
Engine: 5.2l
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Originally Posted by Willys55
did you replace the rear trailing arms, or at least the trailing arm bushings. Rear axle sway is generally caused by excessive play in those bushings
Yes, this on has upper and lower control arms. I replaced all four and the bushings, all brand new.
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