1998 Buick Park Avenue Ultra
The car was shifting into gear but not driving forward about 3 weeks ago. A garage we took it to replaced the tranny fluid (since it was due) and the torque converter clutch solenoid to fix the problem.
After replacement, the shifting was 10x better then it felt before and it fixed the problem where the car was not driving forward while in gear. However, the weather here in Winnipeg reached -20 degrees C (-4 Fahrenheit) today. Today was the first day where the car has this problem again. When I put it into reverse or drive, it will no longer drive forward or backwards.
I asked on another forum called bobistheoilguy.com but was hoping to get a few more opinions before going forward.