GE WDSR2080D4WW top load washer agitator - Is

GE WDSR2080D4WW top load washer agitator - Is there a cog type thing in the agitator that could be jammed & if so, how can the agitator be removed? I think whatever connects the agitator to the motor needs to be replaced (teeth broken?) The agitator is trying to move, but appears to jam, - electrical load increases when this happens, as apparent by a light on the same circuit dimming.
When selector switch is moved through cycle to next stage (drain) the machine drains, spins, rinses but agitator does not agitate normally.