96 windstar r.rotor/strut area vibration

We have been experiencing a vibration in the front end of our van. At highway speed there is a slight vibration coming from the right front wheel area. This vibration is constant when the accelerator is pushed, but if you take your foot off the pedal the vibration stops, but starts back up again when you get back on the gas. So far, because the parts were bad upon looking in that area, we have replaced both front struts, inner tie rods on both left and right sides, brake pads/rotors on both sides, the lower ball joint on the right side, and the sway bar stabilizer link on the right side. We are amateurs at repairs and replace stuff when we have info on how to do it, within reason. Has anyone else experienced this and what did the problem turn out to be. We would like to repair it ourselves if possible.

I had a vibration that was intermittent at highway speed. I replaced both inner and outer tie rod ends and that seemed to cure it. The inner tie rod end was noticably loose before replacement on the side where the vibration seemed to occur (right side).

It was an intermittent vibration that lasted for a few seconds then went away for a period (about 20 seconds or so) at cruising speed.