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Hoppin' Jeep at 50MPH...Death Wobble?


 
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eggdashure
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Joined: 09 Feb 2006

PostPosted: Mon Sep 04, 2006 8:55 pm    Post subject: Hoppin' Jeep at 50MPH...Death Wobble? Reply with quote

Hey All,

Allright, I have a 98 Jeep Cherokee lifted 2 inches that is giving me one hell of a hop at around 50 MPH. It feels like it is coming from the passenger side of the vehicle on the front end. Originally I thought it was the tires, but I installed a different set of the same size, but with the same results. Right at 50 the Jeep feels like it's hitting thousands of little speed bumps.

I have read about the "Death Wobble" but I thought that dealt with hitting a bump and having the vehicle continue to shake after hitting the bump. I get a little of that, so could that translate into a shared problem?

Also, I have a fairly new Skyjacker Stabilizer Shock, only like two years old.

Anyway, help and suggestions are always appreciated!

Thanks,
Matt
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ThePhantum
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Joined: 23 Jan 2004
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PostPosted: Mon Sep 04, 2006 9:22 pm    Post subject: Reply with quote

Tracking down death wobble is a process of elimination. Check to make sure the trackbar is tight, that nothing is worn in the steering linkage, that the ball joints aren't worn, that the wheel bearings are good, etc., etc. Since it feels like it's coming from the passenger side, that's where I would focus.

You installed a different set of tires...but what about the rims? Is it possible that one of them is bent?
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monkeyman3875
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Joined: 06 Jul 2005
Location: Charlotte, NC

PostPosted: Tue Sep 05, 2006 5:17 am    Post subject: Reply with quote

or that wheel is out of balance? Weighted wrong? If it's slightly heavier at one point on the wheel it would skip or hop at high revs.
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eggdashure
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Joined: 09 Feb 2006

PostPosted: Tue Sep 05, 2006 6:51 am    Post subject: Reply with quote

As far as the wheel being bent or out of balance, I balanced them myself and watched each rim closely. There was no where near enough play to get the kind of hop I am getting.

I guess my next question would be, is where is the best place to start, or most likely problem?

Thanks,
Matt
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ThePhantum
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PostPosted: Tue Sep 05, 2006 9:31 am    Post subject: Reply with quote

ThePhantum wrote:
Check to make sure the trackbar is tight, that nothing is worn in the steering linkage, that the ball joints aren't worn, that the wheel bearings are good, etc., etc. Since it feels like it's coming from the passenger side, that's where I would focus.

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eggdashure
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Joined: 09 Feb 2006

PostPosted: Tue Sep 05, 2006 7:27 pm    Post subject: Reply with quote

Any Tech Write-Ups on this? If so, where could I find one. I'm capable of doing the work myself, just don't know what I need to be looking for. Mr. Green

Thanks,
Matt
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ThePhantum
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PostPosted: Tue Sep 05, 2006 8:22 pm    Post subject: Reply with quote

I don't know of any writeups specifically, but there's probably some out there. You really just need to crawl under it and check the components one by one until you find the problem. You're checking to make sure nothing is loose. Have someone turn the steering wheel back and forth and watch for anything moving that shouldn't be, like the track bar, ball joints, the steering joints, etc. Jack up the front end and see if there is any play in the front bearings, check the rotors for warpage, etc.

Like I said it's not an exact science...just process of elimination.
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