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-   -   Very weird death wobble (https://www.jeepforum.com/forum/f9/very-weird-death-wobble-4373897/)

scarface998 10-10-2019 07:40 AM

Very weird death wobble
 
Hello all!


First off let me get some stuff out of the way. I know there is a thread for death wobble, I'm having a very odd case of death wobble so I wanted to start another discussion. Id also like everyone to know that i definitley know the difference between death wobble and shimmies and other such items related to suspensions and driving.



I have a 2005 Jeep wrangler LJ. Its got a 2.5 inch lift and i was having small cases of death wobble when hitting bumps and such so i went ahead and changed the stock track bar to an adjustable track bar with a drop bracket and better joints. THIS SOLVED THE DEATH WOBBLE ISSUE.


I was still having small shimmies because the tires arent perfectly balanced but when i hit bumps and such that previously gave me death wobble i wasnt getting it anymore.


SO. Yesterday i applied fluid film to the suspensions components as well as the entire underbody of the jeep!


I waited until this morning to drive it and oddly enough i experience tire shimmy which provoked death wobble from the jeep. i also went over one bump that gave me a small jerk in the steering which was unusual.



the only thing i changed was the fluid film. Does anyone have any idea or know any reason why fluid film would cause such a substantial change in the suspension or handling? maybe too much lubrication and the suspension was moving more? Did the fluid film degrade the bushings in the front susoension enough to allow wobble?



HELP ME!!


thanks

TheBoogieman 10-14-2019 12:54 AM

How are your tie rod ends? When you get some new tires or get the old ones balanced properly, align the front end too.

Shark_13 10-14-2019 09:30 AM

Yep that^
If you continue to drive it with random shimmys etc, you are always causing more wear on other parts such as rod ends, ball joints, unit bearings etc.

Get the balance fixed (discount tire, roadforce balanced) and check everything else, sounds like you have a worn part.

Also, you mentioned a drop bracket with the track bar.... Exactly what did you put on?

jeffjeep1 10-15-2019 04:43 PM

I replaced ALL the tie rod and track bar pieces in my LJ. Even put on the “V8 Grand Cherokee” parts. Had an alignment done. Always had Roadforce balance done since 2001. Had a bad DW on the interstate at 70 mph.
Turned out to be the hole in the frame bracket where the track bar bolts in had wallowed out. Drilling to the next size hole and one size larger bolt solved that situation.
That could be your cause.

NashvilleTJ 10-16-2019 08:59 AM

Very weird death wobble
 
It sounds like you introduced some bump steer by installing a track bar with a drop bracket. That is likely why the steering wheel jerked when you hit the bump. If you have not modified your steering linkage, the track bar needs to stay in the stock location / orientation.

The fluid film is not an issue. Whatever issue was causing your original death wobble is still there. The new track bar did not resolve it as you think it did.

scarface998 10-22-2019 01:47 PM

so it looks like the recurring death wobble ended up being my own fault. when i installed the bracket i had to drill through the frame and i somehow used the wrong bit. this caused enough wiggle room for the bracket to twist when the suspension compressed. when the bracket twisted the bolts on the bracket started to loosen. re tightening the bolts temporarily fixed my issue. Ive acquired a larger bit and larger bolt and will be re drilling and installing a larger bolt with thread locker to keep the bolts from loosening again. I appreciate everyone's time and advice!

Jerry Bransford 10-23-2019 09:38 AM

Quote:

Originally Posted by scarface998 (Post 40773853)
so it looks like the recurring death wobble ended up being my own fault. when i installed the bracket i had to drill through the frame and i somehow used the wrong bit. this caused enough wiggle room for the bracket to twist when the suspension compressed. when the bracket twisted the bolts on the bracket started to loosen. re tightening the bolts temporarily fixed my issue. Ive acquired a larger bit and larger bolt and will be re drilling and installing a larger bolt with thread locker to keep the bolts from loosening again.

You installed a dropped driver's side track bar mount? Can you post a photo of the installed bracket? Also post a photo of your Pitman arm from the side please.

RDPrimeaux 10-29-2019 08:52 PM

Quote:

Originally Posted by scarface998 (Post 40763159)


changed the stock track bar to an adjustable track bar with a drop bracket.


I also went over one bump that gave me a small jerk in the steering which was unusual.



HELP ME!!


thanks


This


Been said already but bump steer is most probably what is occurring and most probably caused by the installation of the drop bracket. The track bar and draglink are not parallel anymore. Or more unparallel (is that a word?) that it was.



I am, of course, assuming that the factory pitman arm is still in place.


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