I have a 90 Sub 4X4 with a front passenger wheel vibration or chatter. The problem starts at speeds above 50 mph and as soon as I let up on the accelerator the vibration quits. I sometime get the vibration when I hit a bump. I am not sure if I have a “U” joint bad, shock bad or something else. Anybody have any suggestions?

Vibration or wheel shake at 50-60 MPH is usually tire balance or bad tire.
Have the tires check and balance checked and check for lose steering stuff.
A wheel shaking is hard on front end parts.
Let us know how it goes.
MT