Tj S Goddard , KS November 01, 2016 Appliance: Samsung Washer WF338AAW/XAA Samsung Washer Wf338aaw/Xaa: No error code was indicated by the machine self diagnosed. How to replace Assy-S.Tub Back. Replaced spider arm due to corrosion and mechanical failure and rear drum due to crack extending from inner bearing. Problem was diagnosed when machine had excess vibration. Upon further investigation also found corroded metal pieces in my water pump debri collector. 13 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours