01 EX v6. Had bad upper pass side ball joint. Car drove fine. Smooth. Changed control arm. Now have 30mph vibration. Goes away at higher speeds. Did not rotate tires. Took 1/2 hr. Unbolt top strut. Replace arm. What the bleep?

 

Check your work to make sure nothing is loose.

You should tighten the pivot bolts with the weight of the car on the suspension. You can try to tighten the pivot bolts with the car on the ground, but that can be difficult to access. I put the front of the car on jackstands, then put my jack under the lower control arm and jack up the suspension until the car slightly lifts off the jackstand. Then I tighten those pivot bolts.