My recommendation for this database is to include people who have NOT had death wobble with their modification specifics.

A very useful tool in determining root cause is "Is / Is Not". Sometimes you get to the root of the problem quicker by weeding out the things that "Is Not" causing the problem.

A very simple example would be: Is happening on lifted JK's. Is Not happening on JK's with stock suspension. (not saying that's true... just example)

 

I still had DW with bigger tire size and it was more violent.

 

I will never say that I have true DW but I know for a fact that due to the changes that people on this forum has suggested, my Jeep feels a lot tighter. These suggestions have been great and maybe just maybe a few things have contributed to the severe wobble that I have.

I do know that the wobble has been severe enough in the past that during an inspection last night, I found a rear wheel missing its weights. Tonight this will be fixed and we will try the same drive again and again.

The fact that some of the DW problems have been cured with larger tires is prolly due to the fact that the larger tires have more sidewall, thus the tires flex more and the wobbling gets absorbed.

I do find this problem fascinating.

 

yes but did you fix it? what I am getting at is the 2 cases here tat have not resolved DW don't have larger tires

 

that would be a huge thread and you would have to dig through posts to find cases of DW. If you don't post you don't have DW. there are many cases of oem setup with DW. Just look at NHSTA

 

yup, after installing a new track bar and a set of adjustable lowers, i do believe she was able to resolve her DW issues.

 

I guess i am lucky in the fact that I seem to have addressed my DW, but i have been doing some more research and one of the things a have consitently seen failed to be mentioned is "scrub radius". I am not going to explain the whole principal here, I will let you all do your own research, but i have noticed that when increasing lift hight and accompanying tire size/backspacing the scrub radius is increased. This now places a lot of the given traction surface of the tire in a lateral shear force. When and if the tires rebound from this (similar to when your drivetrain binds then releases) it would translate into lateral and vertical movement on the front axle. This rebound should be easily dampened by a well tuned suspenion, but as in my case (my DW was usually triggered around light corners or wet spots that would allow for tire slipage) anything loose in the suspension may alow it to magnify out of control.
I am no engineer and hopefully one of you can prove me wrong on this, but it seems to me that this is a valid issue that is often overlooked. Please chime in if you have any more info to add.

 

exactly my point

 

Yes this was the case.

 

strange thing is rockstomp and I have the same lift. Same track arms too. He has the wobble, I don;t. It is Jeep specific, not lift specific IMO. Like WOL said it is very often a trackarm issue. I know it was at least with TJ death wobble.