Kenmore 80 series washer making lous noise at end of spin cycle?

I have a kenmore 80 series washer. It has stopped spinning and upon opening the cab i noticed that the motor cupling was broken. I replaced the cupling and now everything works ok eccept that when the unit ends the spin cycle or if i open the lid durring the spin cylce it makes a really loud noise. as the tub slows down. seems like the shaft in the middle of theis stopping very quickly but the tub keeps going. takes about 10 seconds for the tub to stop and the noise ofcource slow as the tub does. Any1 know what I can do?
Thanks.