Richard P Roscommon , MI October 14, 2023 Appliance: Whirlpool Washer WTW5550SQ0 Whirlpool Washer Wtw5550sq0: Loud knocking sound after spin cycle. How to replace Washer Agitator Bolt. Replaced the washer drive block, also bought the spanner wrench easy repair washer works like new. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours