Product review (5 stars): Difficult to Install
I viewed several Youtube videos showing how easy it is to install this cam kit.  However, when going through the procedures to detach the upper and lower agitators, they would not come apart no matter how much I tugged and pulled.  The problem was that the clear cam that houses the dog ears was fused to the white receptacle on top of the lower agitator.  I took a heavy hammer and a chisel and wacked away at the cam which was brittle and broke up into jagged pieces.  Care must be taken so as not to damage the white receptacle.  Four white protrusions on top of the receptacle were a bit damaged but this didn't cause a problem later.  Once the cam and the yellow ring below it were removed, the upper agitator easily detached from the lower agitator.  It was then simple to install the new cam kit, and the washing machine performed fine.
My Whirlpool washing machine was purchased in 2003 and is model LSQ9549LWO and the Agitator Cam Kit is No. 285809.