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Do you think if I were to get an alignment i should buy the tie rod or track bar first because it’s like 70 dollars for an alignment and if I replace those I will need another alignment. So should I get those parts and make the repair shop put them on and do my alignment?
It's not alignment . And they sell new replacement track bar bushings .
A dry test will tell you in 5 minutes what is loose.
The speed change seems to be the cause , so you likely have worn steering components.
A track bar bushing can look great and be bad , the bolts can be bad and can also be under torqued .
Tie rod ends can be worn, and the drag ling end as well .
You can even have a loose track bar mount or loose pitman arm
All that is happening is you have enough loose it can auto gyrate,and the speed gives it the power to do that . Slap on bigger tires and it will /can happen at lower speed , and likely be more violent.
Death wobble isn't a jeep only problem , it's just that jeeps are light and often have big tires on them , which over power the vehicles' steering systems ability to fight back and keep it tracking once the wear or tire issue , or both are there. To make it worse ,big tires are hard to balance, and wear components.
It's actually all give and take , the worse a tire is the less worn
components can matter , and vice versa. Typically it's some of both working together, but even a low tire can set it off.