Its not spin its slide. Too easy to drag the rear tires while rolling steering controlling the fronts going downhill on dirt or gravel.
Of course I'm wrong. I've never driven on dirt roads. Just ignore me if you will.
My comments in other threads about master cylinders failing between out of the box and into the street were discounted too. From what I just read , It happened again.
I'm glad the original poster here did get his brakes working.