Washing machine make considersble bumping noises when running, in proportion to its speed. The bearing appears to be ok because the pulley does not move side to side but the rotating drum itself has some movement in relation to the outer drum, it is also eccentric. I suspect that there is a problem with the attachment of the drum to the main spindle. Before I dismantle it I would like to know how the drum is attached to the spindle and is it repairable or is a new part available. Thank you