Kenmore elite dishwasher

The dishwasher runs and washes fine, it has gotten very loud when it is in use, this started 3 days ago. this unit has always been very quiet. Does any body have any ideas, or is it time to repace? The machine is still in very good shape. Thanks for any info.

Check down in the pump for a piece of broken glass or something, that happens quite frequetly.
Nat