Reach inside the drum and turn it with your hand. It should turn easily. If it has resistance you may have a bad idler or wheels or slides. It may be you only need to oil these wheels and idlers. Use a heat resistant lubricant called zoomspout oil from ace hardware. It is nonflamable. Do not use WD 40 that is flammable. It is also posible to oil the motor but you will need to make some oil ports because these dryer motors do not have oil ports.