What fluid should go in a power convertible top motor for 1965 Pontiac lemans?

A 1965 Pontiac LeMans convertible top motor doesn't use hydraulic fluid in the same way a power steering system does. These motors are typically electric and don't require any fluid lubrication inside the motor itself. They might have some lubrication in the gears, but that's factory-sealed and not something you'd add.

If you're having problems with your convertible top motor, the issue is likely electrical (wiring, switch, motor itself) or mechanical (worn gears, binding mechanism). Adding any fluid to the motor itself would likely damage it. Focus your troubleshooting on the electrical system and the mechanical operation of the top mechanism.