On spin cycle only the washer has a loud thumping noise.
Washing machine thumps. ThumpsBumpsBangsRattles These noises can be caused by improper installation such as the shipping rod being left in moving the washer without the shipping rod in place or the washer not being leveled properly. Stacked washers and dryers often come with a stacking kit that once applied keeps the whole unit. After removing the agitator I can reproduce the sound by manually spinning the tub.
If the washer is noisy or loud particularly when the washer is filling the water inlet valve may be at fault. When there is no rod the bangs thumps and rattles may be caused by the hose hitting the back of the washer. A shock absorber is a part that holds the metal chamber inside your washing machine.
A Faulty or Warn Out Tub Bearing. In some cases the absorber detaches and you start to hear a banging noise coming out of your washing machine. A general rocking around of a washing machine on spin may just be caused by an uneven floor or an un-level washing machine.
This video provides information on how to troubleshoot a top-load washer that is making noise and the most likely defective. Tub Bearing If the washer is making a loud noise the tub bearing might be worn out this is a common problem. If the noise occurs when you open a valve or a faucet it is probably air in the pipes.
If you Have the same issue I had in this video it is likely due to the water pressure being to high for this appliance. The noise can be caused by a restriction in the valve from mineral deposits. This way the part can move freely during the spin cycle.
If the washing machine moves slightly out of position it could just be because it is on a tiled or otherwise shiny floor and the rubber feet just slide around too easily. Water hammer can be a big thump that shakes the house or a series of banging noises starting with a loud bang followed by several echoes. In washing machines which have fast-closing fill valves this is especially common.