Washing machine not spinning

Brand:kenmore
Model Number: 110. 16852500
**Main Symptom:**Coupler is good. And clutch seems good. Just received a new clutch from you guys today and it’s in the same shape as the old one . Transmission is leaking oil tho and when I turn the coupler with the belt the long metal shaft will sometimes spin with it and other times not
What happens & when:

Error Code (if any):
Parts or tests already tried:
Photos / video link:

Is the motor running when it is supposed to be spinning?