why machine not rinsing?

Hi I have a Servis automatic 600 washing machine which is about 14 years old. It seems to be washing my clothes okay but when it gets to the rinse and spin cycles it does a very loud rattling noise for what seems a few minutes, the drum does not seem to spin properly for part of the rinse and spin, but then spins properly at some parts.
My clothes have still got quite alot of water in them, can it please be fixed?

Thanks
Claire