Hit a bump at about 30 mph and the front end shook violently and steering wheel went back and forth. Had to come to a complete stop to regain control. Recently rebuilt the entire front end to address mild bump steer and death wobble and have never had this issue.

While running through the front end I noticed my front driveshaft seal had blown and the angle looked extreme. I don't recall if it was this much of an angle before the seal had blown. Question....can this angle cause the front end to cause that symptom? Can't see anything else wrong with the front end.

Items already replaced:

Trackbar
Drag link
Steering box
Tie Rod bar
All tie rods
Ball joints

Here are shots of the driveshaft angle:

 

With a 4.5" lift it's my understanding that you need to replace the driveshaft sooner than later. Seeing as you'll have to do that now, what I would do is remove it and see if the symptoms persist or reoccur. I'm no expert, but by doing so you at least eliminate that variable, so if it happens again, you can trace it to something else.

 

Mine looks the same minus the tear. Only have a few thousand miles on lift though. And only been wheeling once.