Thanks. I am aware that the basket must float in order to agitate.
The basket has a flotation chamber on the bottom which provides boyancy to the basket. This machine has water or some other liquid in the flotation chamber on the bottom of the basket. I am wondering if the chamber is leaking and slowly letting the basket sink during agitate thus allowing the basket to contact the drive hub, causing sudden abnormal torque load on the motor and causing an OL error code.
The machine runs a wash for about 8-9 minutes and then goes to SPIN mode and displays OL.
The manual diagnostic (and auto) passes all tests just fine.