Front end vibration

My thought is steering stabilizer. I had the same symptoms for a while. One day the stabilizer just stop working and I had some serious death wobble on the expressway to the point that I had to stop. I had to replace it. I wish I had known sooner that it was going bad because it caused some other problems in the end, requiring replacement of the trac-bar and a new alignment.
Just a thought.

60 MPH is the magic number for diagnosing balance problems. At 60 MPH, 9 times out of 10, the vibration is the balance. Another indicator is if you can accelerate through it. like when it doesn't vibrate at 40 or 75 MPH but right around 60 MPH.
Bad front U joints can also cause a vibration. Sometimes they do and sometimes they don't. When they do it often starts at a round 45 MPH or so and gets worse as the speed increases. Bad driveshaft U joints can also cause vibration. The test for this is to put five people in the XJ and take a test drive, the different driveshaft angle from the load, often changes the vibration or even eliminates it.
Maybe the balance machine was out of wack and all your tires have a poor balance.

8Mud said:

Bad front U joints can also cause a vibration. Sometimes they do and sometimes they don't. When they do it often starts at a round 45 MPH or so and gets worse as the speed increases. Bad driveshaft U joints can also cause vibration. The test for this is to put five people in the XJ and take a test drive, the different driveshaft angle from the load, often changes the vibration or even eliminates it.
Maybe the balance machine was out of wack and all your tires have a poor balance.

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OK, I'll come clean. Walmart did the tire balancing. Right now I start to get problems right at 60mph. When I ran the rear tires up front I got shaking in the front for 55mph to around 65-70mph and then it was pretty much nothing. I'll have to find a better shop to balance them I guess.

I installed a JKS trackbar up front so I know it's not that. The syptoms are the same as they were before I installed the bar. I'd just like to get the problem before I lift it next month, so I go though hell with whatever problems come about.

I had the almost exact problem. Read on!!

http://208.101.10.250/~naxjaor1/forum/showthread.php?t=911502

or

http://ultimatejeep.proboards101.com/index.cgi?board=tech

ParadiseXJ said:

I had the almost exact problem. Read on!!

http://208.101.10.250/~naxjaor1/forum/showthread.php?t=911502

or

http://ultimatejeep.proboards101.com/index.cgi?board=tech

Click to expand...

I'm leaning towards the tires being out of balance. It never did it with the old tires. Funny thing is the old tires had all sorts of wear. That's why I assumed it was the alignment.

glennv said:

I rotated the tires to isolate maybe a bad balance and it got worse.
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Seems to me you answered your own question right there :compwork: