I've got a 2001 Saab 9-3 SE convertible. It started having problems throwing codes for lock up solenoid and incorrect gear ratio. I now believe that the transmission overheated and it blew because it was definitely blown when I took it out. I got another transmission from a Saab that had been in an accident with 55,000 miles and I put it in. I took it for a drive today and it immediately started having the same issues also the crossmember in the engine bay that goes across over the radiator was so hot it's called in my hand when I touched it I shut the car down immediately I had only driven it for a few minutes it's throwing incorrect gear ratio again. I don't want to blow this transmission so I'm not going to drive until I figure out why it has to be an electrical issue I had checked all the pins for resistance going from the TCM and the dad come up okay. I'm going to check them again soon as I can find the information with the PIN numbers and the ohms. Also the input and output sensors could be the problem but I would find it so difficult to believe that they were bad on my old transmission and on the new one I swapped in I would find it easier to believe that there is an issue with the wires going to Those sensors. Oddly enough on this new transmission they had ripped off one of the plugs that went to one of those sensors and I had to cut it out of my old wiring harness and wire it in which makes me think that maybe just maybe that plug was the issue all along but I don't know that seems to Lucky. So if anyone has any good advice I know I have an electrical issue I did change the TCM and it made no difference whatsoever if I can't track it down I'm going to have it towed to the dealership but I put a lot of time and effort into this car and I'd really like to be able to figure it out myself so any help is greatly appreciated thank you so much.