2000 ford ranger throttle pulsing feels and vibration

[Ranger rider]

My ranger has recently started to vibrate when it reaches around 40mph, and will continue to vibrate until it goes below 20. I’ve heard it might be my U-joints, but is that a good assumption to make, or should I focus somewhere else?

 

[SenorNoob]

There are so many possibilities that you really need to get it in the air check things. If you have a pair of jack stands it's pretty easy to turn one end a time by hand.

 

[pjtoledo]

check tires for ice, the frozen type.

what about above 40? like 60? or is too bad to go that fast?
vibrations below 40 are not balance related, somethings bent or worn badly.

as stated, get the wheels off the ground and spin, feel for catches & out-of-round.