Great news!
Was due for tire rotation, so I decided to look for the problem as Tank suggested.
That was'nt it.

But........ we found it. Someone had mounted aluminum spacers on the front hubs.
3 years of searching for the problem and there it was.
Removed! Remounted and we have a smooooth ride.

I guess I owe a vote of thanks to the forum.

Cheers
Gus