1. Car -420SEL
2. 4 speed automatic
3. Used transmission from a guy in Texas - had about 60,000 miles on it. Paid $600 for trans. -$150 for shipping. Another $60 for fluid and filter. Installed it myself - priceless!
4. Installed the transmission 2 years ago and, so far, no big problems. I have a problem with upshift when the car is cold - but only the one time. Seems like there is not enough pressure to cause it to shift up. Otherwise it runs great.