Hi it happened to my washer about 5 years ago and it was cause by a wear out part called coupling (rubber, parts # 285753)... if you check to see the bottom of your washer, and if you see black rubber dusk it could be the same problem as mine. The part itself only cost $15 to $16 but the labor would about $100+. After another 5 years it is having the same problem again. Peviously the tech already warn me that the problem will repeat because the part is NOT durable.
llc, October 2007