I have an 98 Murcury Sable w/ tranny problems. The tranny doesnt seem to shift properly after the vehicle gets warmed up. While driving the tranny stops shifting. Also the spedometer stops working. I have flushed the tranny and changed the fluid twice. Which seem to help for a little while then it goes back to doing the same crap. The last time I service the tranny I found the tranny filter sitting in the pan. I also went to Autozone and had the codes read and they stated that I had a valve in the tranny sticking. Hence flushing and servicing twice. Please help.