Drum excessive banging when slowing after fast spin

I have a very comprehensive article about washing machine banging and jumping on spin - however, if there's nothing wrong with the loading there could be a fault on the suspension dampers. Suspension used to be very bouncy but these days most washing machines use cheap friction dampers. If you bounce the main tub (drum) up and down with the machine unplugged and the lid off the dampers should absorb the motion. Look for one side that might be jammed or way too springy. Look for anything like one of the dampers coming loose from the base.