AC mode motor timing

[rws1012]

Had to replace my mode motor on my 2001 Silverado 2500. The plate came out with the motor. The new part came with the new plate . Cant get the white gear and new plate gears to work. How do you set the timing on these gears? I have tried different settings but it still wont work with the switch on the dash panel.
You tube videos don't show that part because it is a real pain to get to this part.
Any help is appreciated. Been on this for a week and still can't get all the heat and air to blow out of the right places.