I have the same problem, It because the Agitator clutch is wear off. Replace them they cost about $5. Check following link for the part number 10 in the drawing.
http://www.partselect.com/ModelFrames.aspx?ModelID=66850&ModelNum=LSC8244BQ1&mfgModelNum=&ManufactureID=3&Selected=NPALRQ2P&Position=0&mfg=Whirlpool&Type=&Mark=0
Sinin Lu
November 2006