Python3 soln:

def getNode(llist, positionFromTail):
        """
        find length of list
        position from head = length - position from tail
        iterate again, if traversals = position, print value
        """
        length, traversals = 0,0
        current = llist
        while current:
                length += 1
                current = current.next

        positionFromHead = length-positionFromTail-1
        for i in range(positionFromHead):
                llist = llist.next

return llist.data