There are many different things that can cause what is known as "Death Wobble." What I have done is attach two pics. The first one is related to the front suspension. I highlighted things that will need inspected to make sure they are tight and don't have excessive play.
Pic 2 is of the steering linkage components. The same needs done here.
You will need to safely lift the front of the vehicle off the ground. To check steering linkage, place your hands at 3 and 9 o'clock and try to wiggle back and forth. If you feel a knocking or the wheel moves without the other wheel following it, have a helper watch under the vehicle to identify where the movement is coming from. Pay close attention to the steering damper and drag link. Also, make sure the damper (looks like a shock) isn't leaking or loose.
As far as the suspension parts, take something to use as a pry bar and check for movement in the items I highlighted.
Let me know what you find and if you have other questions.
Images (Click to enlarge)
Friday, June 26th, 2020 AT 9:21 PM