your pump is the most likely culprit if you look in side the washer you will see a seem in the tub next to that will be one of the washer tumblers take the screws out of that tumbler slide it forward there will be a hole there rotate the tub to your right and you will find the hole going down to the drain pump can check it there but i don't think you'll find any thing as that is a larger hole it think your drain pump is now if you have a shop vac this is time to vacuum the water of the tub and all the way down the drain hole for the next stage usally i tell customers to remove the drain hose from the stand pipe and vacuum the water out of the washer from the drain hose but because of the pillow this might not work in your case. Now remove the two screws on the front lower panel and pull the panel
in side you will see the drain pump if you did not have a shop vac go to the auto parts store and buy a pair of radiator hose clamps and clamp the hose line as close to the washer as possible.(but put down some towels as water always stays there) then pull the tub to pump hose by depressing the squeeze clamp(now while your at the auto parts id get a screw clamp to replace the spring clamp it makes putting the hose back on a lot easier)pull the hose off.Then pull the pump to drain hose off .Remove the two 5/16 in screws securing the pump to the washer base.Unplug the connector and remove the pump inspect the pump for foreign objects,broken or stripped impeller blades . if the impeller are stripped you will have to replace the pump then form the front of the washer take a piece of water hose with one end cut off and run it down the pump to drain end of the drain and reassemble the unit