Ryan,
If you feel it in the floor and not steering, chances are it is a rear wheel. Did you check the tires, rims, and you indicated it starts when hitting a bump, so did you check the shocks?
Most times when it is a front-end issue, you feel it in the steering wheel. Rear-wheel issues are mostly from the rear.
Bounce the rear of the vehicle and see how many bounces it takes for it to stop. More than three is an issue. Also, inspect the shocks for leaks. If you take a look at the attached pic, I circled where you may see oil from a blown shock.
Let me know.
Joe
Image (Click to make bigger)
Tuesday, May 18th, 2021 AT 6:04 PM