My Whirlpool washing machine will not agitate or spin. I tried to turn the drum by hand, but it will not move. The machine pumps water in and, once finished, starts making this grinding noise. I checked the agitator and it seems to be ok. Had the machine on the side one time and after lifting it back up, I was able to turn the drum by hand 1/2 a turn, than it got stuck again. This washer is a direct drive one. Can you help? Thanks in advance!