Alternator/generator/regulator problems of the 1996 Lincoln Town Car

Headlights and dash panel cut of intermittantly while driving on smooth pavement for past 10 years. I have had dealership experience this but they could not find any problem. Also, the speedometer shows car speed at 100 or more mph when starting car but goes to normal when moving. I just replaced the motorcraft alternator with a rebuild version and the speedometer problem is gone. Can't be sure that the headlight issue is gone too, but this seems to be the magic fix. I'm wondering if a batch of intermittantly defective motorcraft alternators were oem since this seems to be a problem for others. It is very scary to be driving 55 mph and have the headlights cut off for a short time. Months go by and nothing happens; then there it is again. I was thinking that the car was haunted. I still have the old motorcraft alternator but I will return it to autozone to get my core back unless it can be used to determine it is defective. Over the years I have spent a lot at repair shops and the dealership trying to locate the cause of this. At the suggestion of the dealer service manager, I replaced the speed sensor twice over the years to "fix" the erratic speed at startup but without any change.

1996 Lincoln Town Car steering went out causing consumer to run into a fence. The steering wheel would turn left and right but the wheel did not respond. Rear air spring were replaced due to excessive cracking. The vehicle steering a suspension performed poorly. The dealer replaced the upper and lower ball joints and the inner and outer tie rods. The right front window regulator broke. The interior light on the left side of the vehicle did not work.