98 LeSabre wiper motor replacement
What I referred to as the "passenger wiper thing" is called a transmission assembly in the diagrams. It is the post the wiper arm attaches to. It prevented me from getting the air inlet screen off by pulling toward the front of the car.
By working the air inlet screen I made sure both sides were free. Then I pulled side to side to loosen the screen at the center of the windshield. Rather than pulling to the front I pulled to the drivers side while lifting to clear the transmission post. It came off without breaking the windshield or other parts.
The rest of the job including putting the air inlet screen back on was easy by comparison. The motor is in, works and the screen is in place.