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-   -   Death wobble (https://www.fordbarn.com/forum/showthread.php?t=202888)

RalphM 08-19-2016 03:34 PM

Death wobble
 

I've got over a 1000 miles on my AV8 since built, been on some of the crappiest roads we have here( Google "frost heave".
Last nite I was on an overpass going about 40 and hit a deep rut that ran from side to side, and it started, I had to slow down to make it stop.
I'm wondering if somethings gone wrong, or was it just the right circumstances that set it off.
I took a quick look at the suspension when I got home and nothing. I will jack it up this weekend and dig a little deeper.

JSeery 08-19-2016 03:46 PM

Re: Death wobble
 

Check the normal stuff for any play, tie-rod ends, king pins, spindle bearings, steering box, etc. It doesn't take much play to allow it to get started.

Init1 08-19-2016 03:56 PM

Re: Death wobble
 

I'm testing a VW steering damper on my AV8 and it is working great. J Seery is right. It doesn't take much.

RalphM 08-19-2016 05:08 PM

Re: Death wobble
 

I have the early style drag link with the spring loaded ends. Maybe it's worn in enough to need adjustment.

Capt Kirk 08-19-2016 05:36 PM

Re: Death wobble
 

I lived in Fairbanks for 22 years. On some of those roads, a car out of the showroom can develop a death wobble!

trainguy 08-19-2016 06:12 PM

Re: Death wobble
 

I had the same problem on my 39cs. I installed a jeep steering damper,the car handles better and no death wobble.I just installed a damper on my 1912 Case,same results!

jack orchard 08-19-2016 06:52 PM

Re: Death wobble
 

Even something as simple as loose bumper bolts can cause death wobble. Check everything.

Capt Kirk 08-19-2016 07:01 PM

Re: Death wobble
 

It's all about harmonics.

Krylon32 08-19-2016 08:30 PM

Re: Death wobble
 

I've been installing steering dampners on the cars coming out of my shop for years. Not as a fix but because it seems to make the steering a little more comfortable. I get mine from Pete & Jakes but the VW one is the same.

Barlea 08-19-2016 09:53 PM

Re: Death wobble
 

Quote:

Originally Posted by RalphM (Post 1341282)
I have the early style drag link with the spring loaded ends. Maybe it's worn in enough to need adjustment.

That would be my first guess, had a '33 many years ago that would do that on gravel roads sometimes. Well that was the best roads we had at that time. Used to call that "shimmy", death wobble was more of a crotch rocket thing...

Talkwrench 08-19-2016 10:34 PM

Re: Death wobble
 

1 Attachment(s)
Ahh the scourge of a solid axle, don't worry it doesn't just happen with old cars and trucks trust me. I have never had a problem with my 35 pickup BUT having experienced it in a truck I used to drive for work on a freeway I added a VW damper to my pickup just for insurance , cheap and easy..

FlatheadTed 08-20-2016 01:54 AM

Re: Death wobble
 

Could be a slightly loose wheel bearing ,wobble triggered by a loose steering component, check all the above and wish bone rubber ball ,perch bolts . in some cases to much negative caster ,Ted

Lanny 08-20-2016 09:52 AM

Re: Death wobble
 

I had a '96 Bronco that had a sticky right front brake caliper, so after applying
the brake, the right front brake didn't release very quickly at all, and if you ran
over the slightest bump in the road, before the right front brake quit dragging,
that Bronco went into a death wobble that about shook all your teeth out, and
was scary as hell, till you got it pulled over to the side of the road. :eek:
I replace that caliper and a couple loose tie rod ends, and that took care of it.











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JSeery 08-20-2016 10:01 AM

Re: Death wobble
 

A lot for Ford trucks in the solid and split beam years came with steering dampers.

trainguy 08-20-2016 11:33 AM

Re: Death wobble
 

Quote:

Originally Posted by jack orchard (Post 1341318)
Even something as simple as loose bumper bolts can cause death wobble. Check everything.

Bumper bolt causing death wobble,now that's a new one.

Rustyspokes 08-20-2016 06:52 PM

Re: Death wobble
 

Trainguy, I have a 34 Ford and have the wobble, what year of Jeep did you take the steering damper from , thanks ..R

jack orchard 08-20-2016 07:11 PM

Re: Death wobble
 

Quote:

Originally Posted by trainguy (Post 1341599)
Bumper bolt causing death wobble,now that's a new one.

Mainly on newer 4WD pickups. Bumper is part of stiffness of frame. Might not apply to this era of vehicles.
The point is: don't rule out anything that is not correct.

Step-down 08-20-2016 08:01 PM

Re: Death wobble
 

I found a bolt lose on the steering box to frame that solved the issue ....

trainguy 08-20-2016 08:27 PM

Re: Death wobble
 

Quote:

Originally Posted by Rustyspokes (Post 1341874)
Trainguy, I have a 34 Ford and have the wobble, what year of Jeep did you take the steering damper from , thanks ..R

I believe it was for a 50s cj. I got it from adealer who specialized in early jeep parts.The one I put on my Case I bought from Amazon. It was a generic stabilizer it solver the wobble and wandering problem I was having. I just drove my 39 and is a sweet handling car compared to before the siabilizer.

RalphM 08-20-2016 09:26 PM

Re: Death wobble
 

No wishbone ball, their split, caster is about 6-1/2 to 7 degrees. The tie rod ends are new, and so are the wishbone ends.
As much as it might help, I'm hesitant to put on a stabilizer. My car is a traditional hot rod, built as if it would have been in the early to mid fifties. Something like that would be too much out of place.
Right now the newest part I have is a 56 steering box.


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