Sears Kenmore Heavy Duty 70 Series model 110.92274100 is not fully spinning out the rinse cycle. It seems to work 95 % but not completely. What part needs to be replaced?

Look at: https://dl.dropbox.com/u/8010163/Understanding%20automatic%20washer.pdf
https://dl.dropbox.com/u/8010163/Whirlpool%20Washers.zip
You need to check the spin solenoid which could be stuck and need loosening with cleaning and WD-40, or you could have an open coil which will need to be replaced ($15.00).