Upper agitator would not turn

First I removed the fabric softener dispenser. I removed the inner cap seal and agitator retaining bolt. Then I firmly pulled up on the agitator to remove the complete agitator assembly. I replaced the inner cap seal and installed the new agitator bolt with rubber washer. I placed the new agitator assembly on the drive shaft and tightened the bolt. Lastly I installed the inner seal and the fabric softener dispenser. The total time spent was around 10 minutes.