Strange steering/suspension/acceleration issue

[gespo04]

Hello again JeepKJ users, I've been experiencing a very unique instability issue with my 2003 Liberty when going at highway speeds. The symptoms are as follows:

• When coasting at highway speeds, and I accelerate, the car jerks to the right
• When cruising at highway speeds, and I take my foot off the gas, the car jerks to the left

Now, I've taken a cursory glance under the car to see if there was any obvious catastrophic failure going on, and nothing seems obviously wrong except for a few old bushings. I plan on doing the OME lift kit, and replacing some suspension bushings but I honestly can't tell if my weird instability issue would even be fixed by doing that. It seems to be more of an engine/steering issue than a suspension issue. Any thoughts?

 

[Aceofspades]

How is the rear upper control arm looking ?
How about the lower arms in the rear as well?

 

[duderz7]

Sounds like rear lower control arm. When the bushings go bad that's what happens. Many of the rear lower control arms are covered under a recall, so that's worth checking. Take a look at them and think about how your Jeep would react if was sloppy and it all makes sense. If my brain is working correctly this morning I suspect the right one.

 

[LibertyTC]

Definitely the sign of cracked or worn out bushings in the rear lower control arms.
Basically the slop in the bushings is causing the differential to shift a bit, not good.
Call any dealer with you VIN number to see if the recall of the LCA arms has been performed.
In my case I kept the original LCA arms that came with my jeep, & bought new Spicer bushings, well before any recall.
It was discovered that the axle side bushings had relief slot/ cuts in the bushing, so I filled the slots in with windshield urethane, allowed to cure for 3 days.
I then had them pressed in with a 30 ton press. Many years later the the problem has not returned.

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