Death wobble..WTF?? - Defender Source
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  #1  
Old June 18th, 2010, 10:55 PM
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Death wobble..WTF??

Ok here is my problem.At about 20 mph the steering shakes violently,so hard that it will pull the steering wheel out of your hands.The truck has a 5 inch lift with RTE radious arms with new bushings.New shocks with new bushing.New bushings in the pan hard bar.It also has a rovertracks hd tie rod.I just has an alignment done.The wheel bearings are good and tight.The steering staft is good and tight,same with the steering box.What am i missing?I'm at my wits ends,I'M STUMPED and woulds love to hear your ideas.
Jeff
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  #2  
Old June 18th, 2010, 10:58 PM
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I've never encountered it myself but the usual reply on the web is swivel pin preload
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  #3  
Old June 18th, 2010, 11:00 PM
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Bad tire (broken band inside the tire)?
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Old June 18th, 2010, 11:11 PM
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the tires are bias ply LTB 35's,they're pretty new.
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Old June 18th, 2010, 11:27 PM
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Since you have checked everything else, that is what I would lean toward. Do you have a spare you could rotate to each of the front tires (one at a time). If it happened all of a sudden -- given what you have replaced -- this would be my first guess.

You can check that the bolts holding the swivel pin bearings on are all tight and not broken too.
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Old June 19th, 2010, 08:05 AM
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I had this happen but not as extreme.... I noticed that it was the air pressure in the front tires were really low. check that first. I pumped them back up and had no problem.
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Old June 19th, 2010, 04:13 PM
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I had that a few years ago...my control arm/raidus arm nuts were loose...
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  #8  
Old June 21st, 2010, 10:02 AM
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I had the same issue turned out to be ball joints, swivel preload and the drop arm had to be rebuilt...............
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  #9  
Old June 22nd, 2010, 06:47 AM
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Just curious, does it get any better after the tires warm up? I'm running 34x9 Interco Super Swamper Special Service bias-ply, and they take a set everytime I park it, even overnight. They get better as they are driven on.
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Same place, new dogs.
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  #10  
Old June 23rd, 2010, 01:37 AM
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Willing to bet its your tires out of balance. put some bbs in there and see what happens. Thats what I did with my 38 bias ply swampers on the chevy and it went away.
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  #11  
Old June 23rd, 2010, 10:38 AM
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Take it to NE Offroad. They fixed my death wobble.
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  #12  
Old June 23rd, 2010, 11:03 AM
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Quote:
Originally Posted by MudD1 View Post
The truck has a 5 inch lift with RTE radious arms with new bushings.
What's the new kingpin inclination (aka "caster") with the 5 inch lift?

When the alignment was done, I'm assuming that they didn't adjust the caster, which would have to be a severe adjustment because of the 5 inch lift.
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