Kenmore washer 110.26852501 spinning intermittently

Hello…I have a Kenmore 80 series washer model# 110.26852501. It spins intermittently or will not spin at all. However, when cycle is complete, we are able to switch directly to spin cycle and it will work. Trouble getting more frequent. I checked coupler between motor & trans and it is fine.

I forgot to mention there is a little bit of oil on inside panels and bits of what appears to be black rubberon top of trans.