Hi I have a vibration that starts at 20 MPH through 25/30 MPH. Its a moderate vibration. Not sure whats causing it. I happend after I swapped trans, and changed axles.

Here's what's been replaced in the front end:
Ball Joints (spicer pro grade)
Rear control arm bushings
Sway bar bushings (all)
Both axles: Driver (duralast reman) Pass (a1Cardone brand new)
Wheels/tires: new (balanced out perfectly)
Wheel alignment

 

Go back to the tire shop and have the tires "road forced". This checks for an out-of-round condition tat could be caused by ply separation or a bent rim.