It%26#039;s not hard, but it is cheaper if you have the heart to tackle it. Try this link for the how to%26#039;s:
http://www.autozone.com/servlet/UiBroker鈥?/a>
Good Luck|||unplug the power from the motor,then knock the center out of the rivit and drill the rivit out ,Be sure not to use too big a bit,when replacing the motor it should be rerivited but it takes a big rivit gun to di this.you can use nuts and bolts but be sure to use lock washers and make sure everything is tight