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Unread 02-28-2010, 03:53 PM   #1
hoovail
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Wheel spacers = Death Wobble??

I just put a pair of used 37's on my 2001 TJ. Two are worn unevenly, and I decided to try and run them in the front. I wasn't surprised when I got DW at 35-40mph. So I switched the rears to the fronts, and took of the 1" wheel spacers all around. That fixed the DW, but now I'm wondering if the wheel spacers could have contributed to it?

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Unread 02-28-2010, 03:56 PM   #2
Rubicon_Rob04
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Your seat have a shake to it now at 35-40?
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Unread 02-28-2010, 03:57 PM   #3
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You didn't have DW. You had a little tire wobble.
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Unread 02-28-2010, 03:59 PM   #4
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Quote:
Originally Posted by hoovail View Post
I just put a pair of used 37's on my 2001 TJ. Two are worn unevenly, and I decided to try and run them in the front. I wasn't surprised when I got DW at 35-40mph. So I switched the rears to the fronts, and took of the 1" wheel spacers all around. That fixed the DW, but now I'm wondering if the wheel spacers could have contributed to it?
you have a stock Tie Rod dont ya?
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Unread 02-28-2010, 03:59 PM   #5
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Quote:
Originally Posted by imped4now View Post
You didn't have DW. You had a little tire wobble.
I'm very familiar with DW. The DW is now fixed, and now I have the normal TJ tire wobble!
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Unread 02-28-2010, 04:00 PM   #6
ValleyJeeper
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Worn wheel spacers are not good. If they move at all, they will unbalance the wheel and driving will be bad. You will definitely feel it up front. Its still happening in the rear, you just don't feel it.
I had a set with stock rims that I had to re-torque every 2 weeks. They went in the trash when I bought new wheels.
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Unread 02-28-2010, 04:00 PM   #7
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There are many things that can cause DW and tire balance is a big one. Spacers by themselves shouldn't cause the problem but can make it worse since the tires are further out and any balance issue now gets more leverage.
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Unread 02-28-2010, 04:01 PM   #8
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you would be surprised if you got death wobble.

Your where experiencing a shake due to an unbalanced tire. I believe the shaking was resolved more from moving the uneven tires to back not from removing the spacers.

Death wobble is the violent uncontrollable shaking that is only resolved by coming to a complete stop and wont be caused by an unbalanced tire.
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Unread 02-28-2010, 04:04 PM   #9
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Originally Posted by mudb8 View Post
you have a stock Tie Rod dont ya?
Tera High Steer, Rubicon Express track bar with 8,000 miles on it. Track bar bracket welded to the top of the axle. The track bar and drag link are almost perfectly parallel
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Unread 02-28-2010, 04:05 PM   #10
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Quote:
Originally Posted by hoovail View Post
Tera High Steer, Rubicon Express track bar with 8,000 miles on it. Track bar bracket welded to the top of the axle. The track bar and drag link are almost perfectly parallel
are they properly torqued with no movement? have you had some turn the steering wheel lock to lock and see if anything moves that shouldnt

The tire balance may "initiate" the death wobble but is not the cause. Something is loose or worn and its not your stabilizer.
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Unread 02-28-2010, 04:06 PM   #11
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Quote:
Originally Posted by durango-bob View Post
Spacers by themselves shouldn't cause the problem but can make it worse since the tires are further out and any balance issue now gets more leverage.
I never heard that before, but after removing them, I thought maybe that could have been the case. Thanks
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Unread 02-28-2010, 04:07 PM   #12
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Quote:
Originally Posted by hoovail View Post
Tera High Steer, Rubicon Express track bar with 8,000 miles on it. Track bar bracket welded to the top of the axle. The track bar and drag link are almost perfectly parallel
How much does the RE track bar flex in the bend when someone is turning the wheel back and forth?
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Unread 02-28-2010, 04:19 PM   #13
hoovail
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Quote:
Originally Posted by Vandano View Post
are they properly torqued with no movement? have you had some turn the steering wheel lock to lock and see if anything moves that shouldnt

The tire balance may "initiate" the death wobble but is not the cause. Something is loose or worn and its not your stabilizer.
When I installed the HS and TB everything was dialed in. I will be checking all torque specs, and everything else related to DW if it returns, for now it is back to normal. Everything was fine with the 35's. It started happening with unevenly worn 37's. I suspect my caster is not correct which may be the real cause.

Side note: these are balanced with BB's. About 12oz in each tire.

Quote:
Originally Posted by ValleyJeeper View Post
Worn wheel spacers are not good. If they move at all, they will unbalance the wheel and driving will be bad.
As far as I can tell, the spacers were not worn. What exactly wears on a spacer?
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Unread 02-28-2010, 04:32 PM   #14
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The BB's may be doing it. As novel as the idea is, I've not been able to make it work. After going to standard weights and road force balancing, my tires are smooth. They were not smooth above 50ish with BB's.
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Unread 02-28-2010, 04:43 PM   #15
hoovail
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Quote:
Originally Posted by imped4now View Post
The BB's may be doing it. As novel as the idea is, I've not been able to make it work. After going to standard weights and road force balancing, my tires are smooth. They were not smooth above 50ish with BB's.
This is the second time I tried BB's. The first was when I was trying to diagnose DW the first time. I got rid of them thinking they were the cause, but that did not fix the DW. I have always been skeptical of BB's, but love the idea of not paying for a balance, and not having them go out of balance over time. Smooth tires over 50ish sounds great though!
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