Paul M Orange Park , FL January 02, 2026 Appliance: Whirlpool Washer WTW4816FW3 Whirlpool Washer Wtw4816fw3: Agitator not moving. How to replace Complete Agitator Assembly. The spine on the lower part of the agitator were stripped smooth. I replaced the entire assembly and it fixed the issue Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes