Gearmotor slider

I upgrade my slider to a gear-motor form a regular dc motor, but when the gear-motor is connected the motor control the slider become hard to move by hand.

Is there any way to solve this without without adding a switch.

Provide a link to the motor driver you’re using.

I assume you understand that gearmotors are naturally more difficult to turn simply due to the gears in them. But that you need to ensure is that the default/off state of the driver will be an open/freewheel state (no connection between the motor leads) in order to disable the type of “brake” you seem to be experiencing.

Post a photo of the motor and a link to how you "upgraded" it .

What motor drivers ?