It could be the pump bearing. Tilt the washer back. Look underneath and take the belt off. The pulley on the pump is metal. try turning with your hand both ways. If it grinds that is problem.Sometimes something works it's way into the pump assembly, this will make a clicking or scraping noise. When the motor drive coupler starts to wear down, the washer may also become noisy. Also make sure that there is nothing between the agitator and the tub that could cause it to grind. Make sure your washer is leveled. http://www.justanswer.com/appliance/42wck-ge-profile-top-loading-washer-makes-grinding-noise-when-agitating.html mayhelp you as well as http://www.applianceaid.com/direct.html good luck