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Old August 25th, 2013, 04:33 PM   #1
BstampXJ
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Help diagnose my "wobble"

Just recently bought an XJ for $500, which I couldn't pass the deal up.

Nothing was wrong with the motor and is 99% rust free, so I decided to make a nice lifted DD.

Its a 99 with a 4.0, AW4 trans. 4" lift in the front ~4.25" in the rear.

Brand new lca's with heavy duty mounts and adjustable cam bolts. track bar, steering stabilizer, steering linkage, wheel hubs, rotors and pads. took the bumpstops out for now because the tires I have now wont hit the fenders, 235/75's and are worn evenly and rotated every 5k and were just balanced.

Everything is tight underneath and seems to have no play at all in the steering. When I get on the highway the only time it "wobbles" is around 70mph and I hit just the right bump, but it goes away when i get back down to around 60.

It seems my Jeep has stumped me. Thanks for any help!
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Old August 25th, 2013, 05:03 PM   #2
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adjustable cam bolts? I didn't know that was recommended on lca's...

Things to look into:
- ball joints
- UCAs
- Wheel hubs
- axleshaft joints
- proper toe
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Old August 25th, 2013, 05:05 PM   #3
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Search death wobble.

Every one of these threads is exactly the same. Something is loose or worn out in your front end. /thread
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jeep turned buggy now back to jeep
http://www.greatlakes4x4.com/showthread.php?t=175584
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Old August 25th, 2013, 05:28 PM   #4
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Ball joints are good, wheel hubs and axle shaft joints are all new. just had an alignment done, so proper toe and caster are good.

I did search for death wobble, but mine is only at 70. most cases are at 55 which I thought was unusual for my case.
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Old August 25th, 2013, 06:00 PM   #5
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Quote:
Originally Posted by BstampXJ View Post
Ball joints are good, wheel hubs and axle shaft joints are all new. just had an alignment done, so proper toe and caster are good.

I did search for death wobble, but mine is only at 70. most cases are at 55 which I thought was unusual for my case.
You have something loose. Do what all the rest of the death wobble threads say and you will fix it. There is literally a death wobble thread on this site every other day.
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Old August 25th, 2013, 06:06 PM   #6
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Try rotating tire see if it goes away or moves to the rear
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Old August 25th, 2013, 06:16 PM   #7
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But its not a death wobble. just just a slight wobble, nothing that will shake me off the road.

Tried rotating the tires, no difference.
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Old August 25th, 2013, 06:18 PM   #8
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Quote:
Originally Posted by BstampXJ View Post
But its not a death wobble. just just a slight wobble, nothing that will shake me off the road.

Tried rotating the tires, no difference.
Then start replacing things that haven't been replaced yet.
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Old August 25th, 2013, 06:18 PM   #9
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Then start replacing things that haven't been replaced yet.
And check your toe
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Old August 25th, 2013, 06:33 PM   #10
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U joints at the wheels may be seized/frozen could give a vibration. Most high speed vibs are tire related
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Old August 25th, 2013, 06:34 PM   #11
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Sorry just saw u said axle u joints are new
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Old August 25th, 2013, 07:07 PM   #12
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Try checking the trac bar brackets the holes get egged out and it would not be noticeable with tension on them.
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Old August 25th, 2013, 07:23 PM   #13
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Take it to the scrap yard
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Old August 25th, 2013, 08:08 PM   #14
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Caster issues cause by lift.
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Old August 28th, 2013, 03:15 AM   #15
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lol are the tires balanced?
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