when at opperating temp., the check engine light comes on and the speedometer stops working and also there is no first gear or overdrive. I was told it was a transmission solenoid and also it could be a speed sensor. anyone else have this problem, and if so, what the heck was it? I really do not want to put a lot of money into a 15 year old car even though i do like its comfort and ride. Thanks in advance!