This addressed many kinds of noise a front loader might make t but not the specific one described. Its he kind of answer given by someone trying to be helpful, who knows a lot, but doesn't listen carefully before replying. Been there, done it myself.
Virtually none of these "causes" would create e a loud bang ONLY at the end of the spin cycle with NO other noises during operation.
A bad clutch, which this model/series does NOT HAVE, might.
A bad mechanical transmission, which this model/series does NOT HAVE, might.
A sudden violent noise would happen at the end of a smooth silent spin cycle ONLY if the breaking action caused something heavy to move that was loose, or a supporting part or rettraint was binding .
-spin basket spider (cracked arm or loose)
-shock absorber binding.
-motor mount
-counterweight bolts loose, unlikely on Electrolux division washers - the weights are molded to fit recesses in the plastic outer tub.