Ok do there are a few things that could be causing your death wobble. If your tires feel like they are bouncing back and forth, it is most likely your alignment. Now of your tires are bald, this will cause it too. Check all bushings for extreme wear, less likely cause. If your front end feels like it is shaking from left to right, this is not death wobble, it is most likely tires out of balance, or a shot steering stabilizer. Start by having tires balanced, then replace stabilizer, if your stabilizer is more than 5 years old replace it anyways, it will make a huge difference. If these remedies don't solve it, hit me up and we can troubleshoot it in more detail.
Deadhead is right. I have had death wobble on my jeep and thought that the car was going to fall apart. I went to one garage and his idea of fixing the problem was telling me to replace everything in the jeep...that is not the answer I wanted to hear. I went to a front end expert and they simply balanced my tires and did an alignment and the problem was fixed.
What a jeep hits a pot hole or major bump in the road it will usually cause an alignment issue where your front wheels are toed in and that will cause the problem. There are a few things that can lead to death wobble but a simple alignment will fix the majority of them. A stabilizer will not fix your problem, but will mask it.
I had the same problem on my zj bought it like that and spent hours and hours scratching my head and beating it on the wall trying to fix it I replaced the trac bar the control arms the tie rods drop
Pitman arm and it still did it everybody said the tires the tires i didn't think just the tires could cause the violent wobble it's almost like dieing but I made it alot better by replacing what i did but it still did it until I recently got new tires and rims and it's like brand new couldn't believe it
well i just bought a 1997 Xj sport and it had the same issue if yours has a lift kit you may want to check your bushings because that's what caused mine to get the death wobble at 30Mph it could be that they are not the right bushings so what they'll probably have to do is bore out the holes for larger bushings and bolts. so you may want to check to see if your bushings are worn down. it could also be your tie rods as well. but i would mainly check all your bushings first. like what everyone else is saying a alignment should fix the wobble as well.