between 45-55 mph, there is a vibration in my Jeep. I used to think it was the pinion angle on the rear axle, but last night realized it goes away when turning right, i.e. when changing lanes. But only when turning right, left doesn't do anything. What could cause this?

 

u joint

 

It doesn't pop, bind, or anything else at any speed, just this vibration.

 

still say u joint. what about drive line play? your drive shafts twist around at all?

 

When the vibration first appeared a few months ago, I thought it was a driveline so I checked both several times. no play.

 

Wheel bearing?

 

I was planning to check those next time its in the shop