Just bought my first Olds. 1977 Delta 88 Royale

It runs great. But i'm having trouble with the power windows. They're really tight and sometimes get stuck halfway going up. After 30 years of occasional use (bought it from an 80 year old, original owner. Only 80K miles) i guess this is normal?

Question is, can i take the motors apart and grease them up, (lubed up the tracks yesterday, didn't help much) or are they dead and need to be replaced?

 

The older style GM motors come apart eaisly & can be cleaned ,polish the armature by putting in drill & turning while useing a light emery cloth clean the brushes with spray cleaner strech springs lighty file contact points & re assemble ,good for the next 30 yr