I bought my 1996 Cadillac SeVille from its original owner with 76,000 miles. I've driven it during the winter in Arizona. I started getting a "service transmission" on the message center, so I serviced the transmission by having the fluid and filter changed. The message continued, so I brought the car into a service facility, the code told the tech that it was a turbine speed input sensor, the part is under $100 but it's the last part to come out of the transmission so we're looking at 15 hours of labor. I was told by three national transmission repair chains that it is a common problem and a "design flaw". I got the word today that it's a $3,050 job. Cadillac basically told me that I'm on my own. BE CAREFULL!
Beautiful paint detail, great interior comfort, very nice ride and handling.
Cadillac doesn't want to help on problems with their transmission design.