Hi all, I am new here but have been actively reading forums for a while. I have a 2000 xj with a 6.5 in lift. I recently replaced the drive shaft u joint for the rear axle and passenger axle upper control arm because I accidentally sent the xj over a little bump to fast (came out of no where). I and then had an alignment done on it. I had it sitting for around 10ish months because I moved and recently drove it 12 hrs no stop to its final destination. I took it out for a little adventure the other day and got death wobble (25-35 mph) on a really uneven paved road. I am pretty mechanically savie but get discouraged when comes to steering and suspension. If anybody can lead to some information that could offer solution would be great thanks. I tried to attached some pictures for reference but wasn’t allowing upload. I will try again later. Thanks again for the help.

With someone in the driver's seat turning the wheel back and forth, lie under the front and look for anything that's not moving the way it's supposed to be. Make sure they leave it in park...