Is there a way to disengage the vex 269 motors so when they stop, the wheels still turn freely?
Not really. What exactly would you want this for?
yes. take the motors off of the robot or remove one of the internal gears of the motor.
If you don’t mind making it complicated, you could have a pneumatic shift a gear so that the motors turns into a ‘‘neutral’’ mode.
Other than that, in the internals of the motor you can not make the motor spin completely freely without any resistance (while still having it be able to be powered).