Thanks Greg, but it ain't that. All of that's good.
As soon as very slight pressure is applied to the pedal ... BAM, they all lock up.
Let off the pedal and all is fine. Might do it a time or 2, then all operates as normal.
I even seen 4 skidmarks in the gravels, and once all 4 on the pavement. I live on a dirt road.
Thanks .... still wondering,