To lock the gearbox in gear:
The black plastic piece that holds the drill motor in alignment. This is the flimsy black plastic piece that actually cover the drill motor. Carefully take it off and rotate it 180 degrees. If it was a clock and up was 12 oclock, rotate it to 6 oclock and snap it back onto the gearbox.
When the motor mount is put in 180 degrees backward, it will have a tab that will keep the motor in gear. This tab physically pushes on the white plastic shifter.
No screws necessary!
Neill
