Inglis model# 1A44500?

the washer fills and agitates, but after washing the timer keeps clicking and moving forward and sometimes it spins very slowly letting out some water but it does not spin the clothes properly. the timer keeps moving until it is finished but the clothes are still sitting in soapy water when finished. the coupler has been changed. Sometimes when I stop and move the timer I can get it to spin, but it stops again when it comes to the next time to spin. Could it be the timer. I understand the timer is expensive and wonder if it is worth it. The machine is 12 years old and has been used by two families. looking forward to some advice, thanks MB