No. This is commonly caused by worn agitator dogs. The upper portion of the agitator (called the auger) has a cam assembly with small agitator dogs that act as a clutching mechanism to drive the auger during the wash cycle. They wear out over time and need to periodically be replaced. The following link explains what they are and how to replace them:
http://www.fixya.com/support/r823955-replacing_agitator_dogsThe part number is included in the link I provided. You can purchase replacements at appliancepartspros.com for about $5. For a little more you can purchase the entire cam replacement kit which includes the dogs, cam, seals and washers.
If you have any questions, please let me know. I hope this helps you.
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