loud thumping noise in spin cycle?

A knocking noise can be a loose tub weight. This would normally be worse with heavy loads and would not be present on spin with no washing in. This is because the knocking noise is caused when the tub (or outer drum) shakes about on spin. Without washing inside the drum the tub doesn't move. Another symptom of a loose tub weight is grey concrete dust under the washing machine. Warning: These days most washing machines have plastic tubs and over tightening a tub weight bolt can easily shear the bracket resulting in a new tub being required. Try loctite. Often, once a tub weight has come loose the plastic tub is damaged anyway especially if it isn't caught early enough

john
February 2009

1) bearing have collapsed about to lock up the drum when you turn it.
2) or one of the spider assembly arms has broke away from mounting.

wirecutterman
September 2008