LG top loader is not spinning?

Hi there, I have an LG top loader WF-T853A washing machine which is not spinning. Everything else seems to work, as in the agitating & draining, except the last spin cycle. It makes noise & rocks because the agitator moves the clothes a bit, but the inner tube doesn't spin. There is no alarm code, I tried a master reset by unplugging & then opening closing lid, but nothing. It has worked fine for 12 years, do I need to just buy a new one, or worth trying to fix..... Any ideas??