I am familiar with how it works. I have worked on enough trucks and ridden in vehicles with death wobble to know that the proper track bar and proper maintenance will solve the issue.
This however is something all together different. Many guys have referred to it as an "oscillation" problem. And again, if it was simply a track-bar, Ford would have it fixed, but they can't.
im sure you are, But many are curing it with HD stabilizers. That is a mask.... for a shift in the axle. nothing more. A steering stabilizer only masks the problem by stiffening the left right of the steering wheel motion.
Here is what happens. the track bar is lose or has a bad bushing. it shifts less then 3/16" rapidly. That shifting shifts the body and not the axle as the axle is planted. What this does is turns the steering wheel sharply to one side or the other. As the minimal amount of movement of the track bar makes up 3 inches at the steering wheel. This in turn begins to yank the steering wheel left to right causing death wobble. This problem then can be masked by the addition of a steering stabilizer. This slows the movement down making it controllable or not felt at all.
it VERY much feels like an oscillation, your wheels are turning left and right very fast in an uncontrolled motion over powering the shocks with the radial forces caused by this. Your driving forward at 40 mph with 70 wheel and tires rotating being violently whipped from side to side.
Ill bet Torquing the track bar a bit more on these trucks, changing to a proper bolt, or getting a better bushing is the fix for this problem.
i found a few people who have said after visiting Ford it ix fixed for a bit after they replace everything. points to bad bushing or a bolt that after a bit loosens a hair and creates death wobble.
if anyone is in the area, come by, ill cure their death wobble issues. Never failed yet. Ill even video the front end shifting side to side with a moving track bar before I touch it.
The result of front end replacement only delays death wobble for a short time do to poor replacement parts.Our dealer ask us to replace tire's to compensate tire issues that don't fix ****.
[video=youtube;ZmP8kefje6w]
https://www.youtube-nocookie.com/embed/ZmP8kefje6w?feature=oembed
