Wiper motor replacement for a 99 crown vic

First you remove the complete wiper arm assembly then you remove the grill over the wiper transmission then you disconnect the wiper motor plug remove the complete wiper motor and transmission all out in one shot if the new motor has a different arm you will have to buy an new wiper transmission because the updated motor it will cause the arm to keep popping off

I replaced the same part on a 1994 Crown Vic. There are a few bolts which go through rubber mounts on the firewall and that is how the wiper motor fits against the firewall. There is a clip on the wiper drive that must be pressed and slid off the wiper shaft. The hardest part was getting clearence between the engine and wiper motor. If I remember there was a way to turn the wiper case to clear the engine. I have asked myself why this was engineered like this? There is nothing important in the way that 3/4" of clearance could have been given for removal.