Customer Questions and Answers for Washer Spanner Nut by Whirlpool

Hello Sharon, The spanner nut WP21366 could be loose, but if this is the cause, it will need a new drive block WP389140 and possibly a new basketdrive assembly W10820043. If the spanner nut is loose, the drive block will have to b replaced, but you need to determine if the basket drive needs replaced or not. This is done by looking at the "ears" that stick up and mesh with the two notches in the drive block. If the ears are square on both sides of both ears, the basketdrive is good. If one side of both ears are rounded off, the basketdrive will have to be replaced to avoid a repeat of the same issue. There is a special tool used to remove and reinstall the spanner nut. The part number is TB123B. You could have a bad motor coupler unless the unit is agitating properly. If it is agitating properly, the motor coupler cannot be the issue.