[Jake Blake]

"Jake, it slips when going through the cycle."

I was only wanting to make the distinction because of the small chance the change mech is binding or frozen up, . . . but indeed, it's probably just  a bad idler wheel.   These VMs actually had quite a bit of torque to them, so if you can slow or stop the platter with a slight pressure from a finger on the side of the platter, it's the idler, and perhaps no major problem with the change mechanism.